some more

17 files changed, 3805 insertions, 86 deletions

diff --git a/Advent-of-Code-2020/AOC-6/build.sh b/Advent-of-Code-2020/AOC-6/build.sh
new file mode 100755
index 0000000..6be9241
--- /dev/null
+++ b/Advent-of-Code-2020/AOC-6/build.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -xe
+
+gcc -o main -Wall -Wextra main.c
+
+./main
diff --git a/Advent-of-Code-2020/AOC-6/example.txt b/Advent-of-Code-2020/AOC-6/example.txt
new file mode 100644
index 0000000..24211d5
--- /dev/null
+++ b/Advent-of-Code-2020/AOC-6/example.txt
@@ -0,0 +1,16 @@
+abc
+
+a
+b
+c
+
+ab
+ac
+
+a
+a
+a
+a
+
+b
+EOF
diff --git a/Advent-of-Code-2020/AOC-6/input.txt b/Advent-of-Code-2020/AOC-6/input.txt
new file mode 100644
index 0000000..2b636c2
--- /dev/null
+++ b/Advent-of-Code-2020/AOC-6/input.txt
@@ -0,0 +1,2234 @@
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+EOF
diff --git a/Advent-of-Code-2020/AOC-6/main.c b/Advent-of-Code-2020/AOC-6/main.c
new file mode 100755
index 0000000..7fa135e
--- /dev/null
+++ b/Advent-of-Code-2020/AOC-6/main.c
@@ -0,0 +1,80 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#if 0
+#define PART_1
+#else
+#define PART_2
+#endif
+
+#if 0
+#define FILE_PATH "example.txt"
+#else
+#define FILE_PATH "input.txt"
+#endif
+
+int q_answ = 0;
+
+void parse()
+{
+    FILE *fp = fopen(FILE_PATH, "r");
+    if(!fp) {
+        fprintf(stderr, "ERROR: Could not open file: %s", FILE_PATH);
+        exit(EXIT_FAILURE);
+    }
+
+    char questions[26] = "abcdefghijklmnopqrstuvwxyz";
+    int answered[26] = {0};
+
+#ifdef PART_2
+    int ppl_in_group = 0;
+#endif
+
+    char line[32];
+    while(fgets(line, sizeof(line), fp) != NULL)
+    {
+        if(line[0] == '\n' || strncmp(line, "EOF", 3) == 0) {
+            for(int i = 0; i < 26; i++) {
+            #ifdef PART_1
+                q_answ += answered[i];
+            #endif
+
+            #ifdef PART_2
+                if(answered[i] == ppl_in_group)
+                     q_answ++;
+            #endif
+            }
+
+        #ifdef PART_2
+            ppl_in_group = 0;
+        #endif
+            memset(answered, 0, sizeof(answered));
+            continue;
+        }
+
+        #ifdef PART_2
+            ppl_in_group++;
+        #endif
+
+        for(int i = 0; i < strlen(line); i++)
+            for(int j = 0; j < 26; j++)
+                if(line[i] == questions[j]) {
+                #ifdef PART_1
+                    answered[j] = 1;
+                #endif
+                #ifdef PART_2
+                    answered[j]++;
+                #endif
+                }
+    }
+
+    fclose(fp);
+}
+
+int main(void)
+{
+    parse();
+    printf("%d questions answered\n", q_answ);
+    return 0;
+}
diff --git a/Advent-of-Code-2021/AOC-16/build.sh b/Advent-of-Code-2021/AOC-16/build.sh
new file mode 100755
index 0000000..6be9241
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-16/build.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -xe
+
+gcc -o main -Wall -Wextra main.c
+
+./main
diff --git a/Advent-of-Code-2021/AOC-16/main.c b/Advent-of-Code-2021/AOC-16/main.c
new file mode 100644
index 0000000..baa6501
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-16/main.c
@@ -0,0 +1,25 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#if 1
+    #define FILE_PATH "example.txt"
+#else
+    #define FILE_PATH "input.txt"
+#endif
+
+void parse()
+{
+    FILE *fp = fopen(FILE_PATH, "r");
+    if(!fp) {
+        fprintf(stderr, "ERROR: Could not open file: %s\n", FILE_PATH);
+        exit(EXIT_FAILURE);
+    }
+
+    fclose(fp);
+}
+
+int main(void)
+{
+    parse();
+    return 0;
+}
diff --git a/Advent-of-Code-2021/AOC-20/build.sh b/Advent-of-Code-2021/AOC-20/build.sh
new file mode 100755
index 0000000..f308db6
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-20/build.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -xe
+
+gcc -o main -Wall -Wextra main.c -g
+
+./main
diff --git a/Advent-of-Code-2021/AOC-20/example.txt b/Advent-of-Code-2021/AOC-20/example.txt
new file mode 100644
index 0000000..8fa4bd4
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-20/example.txt
@@ -0,0 +1,7 @@
+..#.#..#####.#.#.#.###.##.....###.##.#..###.####..#####..#....#..#..##..###..######.###...####..#..#####..##..#.#####...##.#.#..#.##..#.#......#.###.######.###.####...#.##.##..#..#..#####.....#.#....###..#.##......#.....#..#..#..##..#...##.######.####.####.#.#...#.......#..#.#.#...####.##.#......#..#...##.#.##..#...##.#.##..###.#......#.#.......#.#.#.####.###.##...#.....####.#..#..#.##.#....##..#.####....##...##..#...#......#.#.......#.......##..####..#...#.#.#...##..#.#..###..#####........#..####......#..#
+
+#..#.
+#....
+##..#
+..#..
+..###
diff --git a/Advent-of-Code-2021/AOC-20/input.txt b/Advent-of-Code-2021/AOC-20/input.txt
new file mode 100644
index 0000000..b40d613
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-20/input.txt
@@ -0,0 +1,102 @@
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diff --git a/Advent-of-Code-2021/AOC-20/main.c b/Advent-of-Code-2021/AOC-20/main.c
new file mode 100644
index 0000000..1dbcdc9
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-20/main.c
@@ -0,0 +1,144 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+
+#if 0
+#define PART_1
+#else
+#define PART_2
+#endif
+
+#if 0
+    #define FILE_PATH "example.txt"
+    #define T_WIDTH  5
+    #define T_HEIGHT 5
+#else
+    #define FILE_PATH "input.txt"
+    #define T_WIDTH  100
+    #define T_HEIGHT 100
+#endif
+
+#define WIDTH  256
+#define HEIGHT 256
+
+#define OFFSET_X ((WIDTH/2)  - (T_WIDTH/2))
+#define OFFSET_Y ((HEIGHT/2) - (T_HEIGHT/2))
+
+
+int board[WIDTH][HEIGHT];
+int new_board[WIDTH][HEIGHT];
+int enchance_alg[512];
+
+void parse()
+{
+    FILE *fp = fopen(FILE_PATH, "r");
+    if(!fp) {
+        fprintf(stderr, "ERROR: Could not open file: %s\n", FILE_PATH);
+        exit(EXIT_FAILURE);
+    }
+
+    char line[1024] = {0};
+
+    fgets(line, sizeof(line), fp);
+    for(int i = 0; i < 512; i++)
+        if(line[i] == '.')
+            enchance_alg[i] = 0;
+        else
+            enchance_alg[i] = 1;
+
+    fgets(line, sizeof(line), fp);
+
+    char ch;
+    int i = 0;
+    while((ch = getc(fp)) != EOF)
+    {
+        if(ch == '\n') continue;
+        else if(ch == '.')
+            board[i%T_WIDTH + OFFSET_X][i/T_WIDTH + OFFSET_Y] = 0;
+        else if(ch == '#')
+            board[i%T_WIDTH + OFFSET_X][i/T_WIDTH + OFFSET_Y] = 1;
+
+        i++;
+    }
+
+
+    fclose(fp);
+}
+
+int generate_index(int *vals)
+{
+    int index = 0;
+    for(int i = 0; i < 9; i++)
+    {
+        index |= (vals[8-i] & 1)<< i;
+    }
+    return index;
+}
+
+void enchance()
+{
+    for(int i = 0; i < HEIGHT; i++)
+    {
+        for(int j = 0; j < WIDTH; j++)
+        {
+            int vals[9];
+            for(int y = -1; y <= 1; y++)
+                for(int x = -1; x <= 1; x++)
+                {
+                    int vals_i = (y+1) * 3 + (x+1);
+                    if(i+y < 0 || i+y >= HEIGHT ||
+                       j+x < 0 || j+x >= WIDTH)
+                        vals[vals_i] = board[j][i];
+                    else
+                        vals[vals_i] = board[j+x][i+y];
+                }
+            new_board[j][i] = enchance_alg[generate_index(vals)];
+        }
+    }
+    memcpy(board, new_board, sizeof(board));
+}
+
+void print_board()
+{
+    for(int i = 0; i < HEIGHT; i++)
+    {
+        for(int j = 0; j < WIDTH; j++)
+            if(board[j][i] == 0) putc('.', stdout);
+            else                 putc('#', stdout);
+
+        putc('\n', stdout);
+    }
+}
+
+void print_alg()
+{
+    for(int i = 0; i < 512; i++)
+    {
+        if(enchance_alg[i] == 0) putc('.', stdout);
+        else                     putc('#', stdout);
+    }
+    putc('\n', stdout);
+}
+
+
+int main(void)
+{
+    parse();
+
+#ifdef PART_1
+    for(int i = 0; i < 2; i++)
+#endif
+#ifdef PART_2
+    for(int i = 0; i < 50; i++)
+#endif
+        enchance();
+
+    int lit = 0;
+    for(int i = 0; i < HEIGHT; i++)
+        for(int j = 0; j < WIDTH; j++)
+            if(board[j][i] == 1) lit++;
+
+    printf("%d pixels are lit\n", lit);
+    return 0;
+}
diff --git a/Advent-of-Code-2021/AOC-3-old/input.txt b/Advent-of-Code-2021/AOC-3-old/input.txt
new file mode 100644
index 0000000..e324b50
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-3-old/input.txt
@@ -0,0 +1,1000 @@
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diff --git a/Advent-of-Code-2021/AOC-3-old/main.c b/Advent-of-Code-2021/AOC-3-old/main.c
new file mode 100644
index 0000000..51cab24
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-3-old/main.c
@@ -0,0 +1,86 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <assert.h>
+#include <stdint.h>
+
+#define N 5
+#define INP_COUNT 12
+
+int table[N];
+
+void ParseInput(char *filepath)
+{
+  char ch;
+  FILE *fp;
+  fp = fopen(filepath, "r");
+
+  if(fp == NULL)
+  {
+    fprintf(stderr, "ERROR: something with file idk what fuck you");
+    exit(EXIT_FAILURE);
+  }
+
+  int i = 0;
+  while((ch = fgetc(fp)) != EOF)
+  {
+    if(ch == '\n') { i = 0; continue; }
+
+    if(ch == '1')
+      table[i] += 1;
+
+    i += 1;
+  }
+
+  fclose(fp);
+}
+
+void PrintTable()
+{
+  for(int i=0; i<N; i++)
+  {
+    printf("bitplace %d: %d\n", i+1, table[i]);
+  }
+}
+
+int PartOne()
+{
+  int gamma_val = 0;
+  for(int i=0; i<N; i++)
+  {
+    assert(table[i] != (INP_COUNT/2));
+      
+    if(table[i] > (INP_COUNT/2))
+    {
+      gamma_val = gamma_val | (1 << (N-1-i));
+    }
+  }
+
+  int epsilon_val = gamma_val;
+  for(int i=0; i<N; i++)
+  {
+    epsilon_val = epsilon_val ^ (1 << i);
+  }
+
+  int result = gamma_val * epsilon_val;  
+  return result;  
+}
+
+int PartTwo()
+{
+  
+  
+  int result = 0;
+  return result;
+}
+
+int main(void)
+{
+  memset(table, 0, sizeof(int)*N);
+  ParseInput("sample.txt");
+
+  PrintTable();
+  printf("Part 1-RESULT: %d\n", PartOne());
+ 
+  return 0;
+}
diff --git a/Advent-of-Code-2021/AOC-3/sample.txt b/Advent-of-Code-2021/AOC-3-old/sample.txt
index a6366a8..a6366a8 100644
--- a/Advent-of-Code-2021/AOC-3/sample.txt
+++ b/Advent-of-Code-2021/AOC-3-old/sample.txt
diff --git a/Advent-of-Code-2021/AOC-3/build.sh b/Advent-of-Code-2021/AOC-3/build.sh
new file mode 100755
index 0000000..6be9241
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-3/build.sh
@@ -0,0 +1,7 @@
+#!/bin/sh
+
+set -xe
+
+gcc -o main -Wall -Wextra main.c
+
+./main
diff --git a/Advent-of-Code-2021/AOC-3/example.txt b/Advent-of-Code-2021/AOC-3/example.txt
new file mode 100644
index 0000000..a6366a8
--- /dev/null
+++ b/Advent-of-Code-2021/AOC-3/example.txt
@@ -0,0 +1,12 @@
+00100
+11110
+10110
+10111
+10101
+01111
+00111
+11100
+10000
+11001
+00010
+01010
diff --git a/Advent-of-Code-2021/AOC-3/main.c b/Advent-of-Code-2021/AOC-3/main.c
index 51cab24..29d334e 100644
--- a/Advent-of-Code-2021/AOC-3/main.c
+++ b/Advent-of-Code-2021/AOC-3/main.c
@@ -1,86 +1,97 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
-#include <assert.h>
-#include <stdint.h>
 
-#define N 5
-#define INP_COUNT 12
+#if 1
+    #define PART_1
+#else
+    #define PART_2
+#endif
 
-int table[N];
+#if 0
+    #define FILE_PATH "example.txt"
+    #define NUMS 12
+    #define BITS 5
+#else
+    #define FILE_PATH "input.txt"
+    #define NUMS 1000
+    #define BITS 12
+#endif
 
-void ParseInput(char *filepath)
+int nums[NUMS] = {0};
+
+void parse()
 {
-  char ch;
-  FILE *fp;
-  fp = fopen(filepath, "r");
+    FILE *fp = fopen(FILE_PATH, "r");
+    if(!fp) {
+        fprintf(stderr, "ERROR: Could not open file %s\n", FILE_PATH);
+        exit(EXIT_FAILURE);
+    }
 
-  if(fp == NULL)
-  {
-    fprintf(stderr, "ERROR: something with file idk what fuck you");
-    exit(EXIT_FAILURE);
-  }
+    char line[32];
+    int index = 0;
+    while(fgets(line, sizeof(line), fp) != NULL)
+    {
+        for(int i = 0; i < BITS; i++)
+            nums[index] |= (line[i] - '0') << (BITS-1 - i);
+
+        index++;
+    }
 
-  int i = 0;
-  while((ch = fgetc(fp)) != EOF)
-  {
-    if(ch == '\n') { i = 0; continue; }
+    fclose(fp);
+}
 
-    if(ch == '1')
-      table[i] += 1;
+ulong gen_gamma()
+{
+    int most_common[BITS] = {0};
+
+    for(int i = 0; i < BITS; i++)
+    {
+        int ones = 0;
 
-    i += 1;
-  }
+        for(int j = 0; j < NUMS; j++)
+            if(nums[j] & (1 << i)) ones++;
 
-  fclose(fp);
+        if(ones > NUMS/2) most_common[i] = 1;
+    }
+
+    ulong gamma = 0;
+
+    for(int i = 0; i < BITS; i++)
+        gamma |= most_common[i] << i;
+
+    return gamma;
 }
 
-void PrintTable()
+void print_nums()
 {
-  for(int i=0; i<N; i++)
-  {
-    printf("bitplace %d: %d\n", i+1, table[i]);
-  }
+    for(int i = 0; i < NUMS; i++)
+        printf("%b\n", nums[i]);
 }
 
-int PartOne()
+void part_1()
 {
-  int gamma_val = 0;
-  for(int i=0; i<N; i++)
-  {
-    assert(table[i] != (INP_COUNT/2));
-      
-    if(table[i] > (INP_COUNT/2))
-    {
-      gamma_val = gamma_val | (1 << (N-1-i));
-    }
-  }
-
-  int epsilon_val = gamma_val;
-  for(int i=0; i<N; i++)
-  {
-    epsilon_val = epsilon_val ^ (1 << i);
-  }
+    ulong gamma = gen_gamma();
+    ulong epsilon = (~gamma & ~(~0 << BITS));
 
-  int result = gamma_val * epsilon_val;  
-  return result;  
+    printf("Power consumption is %lu", gamma*epsilon);
 }
 
-int PartTwo()
+void part_2()
 {
-  
-  
-  int result = 0;
-  return result;
+    exit(EXIT_FAILURE);
 }
 
 int main(void)
 {
-  memset(table, 0, sizeof(int)*N);
-  ParseInput("sample.txt");
+    parse();
+
+#ifdef PART_1
+    part_1();
+#endif
+#ifdef PART_2
+    part_2();
+#endif
 
-  PrintTable();
-  printf("Part 1-RESULT: %d\n", PartOne());
- 
-  return 0;
+    return 0;
 }
diff --git a/Advent-of-Code-2021/AOC-5/main.c b/Advent-of-Code-2021/AOC-5/main.c
index ea39e06..d83ec06 100644
--- a/Advent-of-Code-2021/AOC-5/main.c
+++ b/Advent-of-Code-2021/AOC-5/main.c
@@ -97,42 +97,16 @@ void print_board()
     }
 }
 
-void part_1()
+int main(void)
 {
     parse();
 
     int count = 0;
     for(int i = 0; i < HEIGHT; i++)
         for(int j = 0; j < WIDTH; j++)
-            if(board[j][i] >= 2) count++;
+            if(board[j][i] >= 2) count += 1;
 
     printf("Count is %d\n", count);
-}
-
-void part_2()
-{
-    parse();
-
-    int count = 0;
-    for(int i = 0; i < HEIGHT; i++)
-        for(int j = 0; j < WIDTH; j++)
-            if(board[j][i] >= 2) count++;
-
-    // print_board();
-
-    printf("Count is %d\n", count);
-}
-
-int main(void)
-{
-
-#ifdef PART_1
-    part_1();
-#endif
-
-#ifdef PART_2
-    part_2();
-#endif
 
     return 0;
 }