day 1-5

day_3/code.py

@@ -0,0 +1,89 @@
+import fileinput
+
+data = []
+for inp in fileinput.input():
+    val = inp.strip()
+    if val != '':
+        data.append(val)
+
+commons = []
+epsilon = []
+gamma = []
+charLen = len(data[0])
+lineLen = len(data)
+for i in range(charLen):
+	count = 0
+	for j in range(lineLen):
+		if data[j][i] == '1':
+			count += 1
+
+	status = 'lt'
+	#print(count, lineLen-count)
+	if count == (lineLen-count): status = 'eq'
+	if count > (lineLen-count): status = 'gt'
+	
+	if status == 'gt':
+		most,least = '1', '0'
+	else:
+		most,least = '0', '1'
+
+	gamma.append(most)
+	epsilon.append(least)
+	commons.append((status, most, least))
+
+g = int(''.join(gamma), 2)
+e = int(''.join(epsilon), 2)
+
+
+def get_distribution(nbs):
+	out = []
+	for _i in range(len(nbs[0])):
+		count = 0
+		for _j in range(len(nbs)):
+			if nbs[_j][_i] == '1': count += 1
+		status = 'lt'
+		if count == (len(nbs)-count): status = 'eq'
+		if count > (len(nbs)-count): status = 'gt'
+		most,least = ('1', '0') if status == 'gt' else ('0', '1')
+		out.append((status, most, least))
+
+	return out
+
+def filter_item(mode, status, most, least, x, i, full):
+	print(f'{mode=}, {status=}, {most=}, {least=}, {x=}, {i=}, {full=}')
+	if mode:
+		if status == 'eq':
+			return x == '1'  # oxygen
+		if x == most: return True
+		
+	if not mode: # co2
+		if status == 'eq':
+			return x == '0'
+		if x == least: return True
+
+	return False
+
+def rating(inp, mode = True):
+	nb = inp.copy()
+	i = 0
+	while len(nb) > 1:
+		distri = get_distribution(nb)
+		print(f'= {len(nb)} -> {nb} {distri=}')
+		status, most, least = distri[i]
+		nb = list(filter(lambda x: filter_item(mode, status, most, least, x[i], i, x), nb))
+		i += 1
+	print(f'after filter: {nb}')
+	return int(nb[0], 2)
+
+print(g, e)
+print(g*e)
+
+print(commons)
+o = rating(data, True)
+c = rating(data, False)
+print('==')
+print(o) # oxygen
+print(c) # CO2
+print(o*c)
+
+

day_3/input1.txt

@@ -0,0 +1,12 @@
+00100
+11110
+10110
+10111
+10101
+01111
+00111
+11100
+10000
+11001
+00010
+01010

day_3/main.c

@@ -0,0 +1,66 @@
+#include <string.h>
+#include <stdio.h>
+
+int tobin(char *inp)
+{
+  int len = strlen(inp);
+  printf("%d", len);
+  int out = 0;
+  int i = 0;
+  while (inp[i] != '\0') {
+    if (inp[i] == '1') {
+      out = out | (1 << len-i-1);
+    }
+    i++;
+  }
+  return out;
+}
+
+int main(int argc, char** argv) {
+  char input;
+  char lines[1024][32];
+  int lineCount = 0;
+  int charCount = 0;
+  while (scanf("%c", &input) == 1) {
+    if (input == '\n') {
+      charCount = 0;
+      lineCount++;
+    } else {
+       lines[lineCount][charCount] = input;
+       charCount++;
+    }
+  }
+  
+  charCount = strlen(lines[0]);
+
+  char gamma[32];
+  char epsilon[32];
+  printf("Recorded %d %d \n", lineCount, charCount);
+  for (int i = 0; i < charCount; i++) {
+    int oneCount = 0;
+    for (int j = 0; j < lineCount; j++) {
+       printf("%c", lines[j][i]);
+       if (lines[j][i] == '1')
+         oneCount++;
+    }
+    printf("\n count: %d \n", oneCount);
+    if (oneCount > (lineCount-oneCount)) {
+      epsilon[i] = '0';
+      gamma[i] = '1';
+    } else {
+      epsilon[i] = '1';
+      gamma[i] = '0';
+    }
+    printf("\n");
+  }
+  gamma[i+1] = '\0';
+  epsilon[i+1] = '\0';
+  printf("gamma: %s  epsilon: %s \n", gamma, epsilon);
+
+  int e = tobin(epsilon);
+  int g = tobin(gamma);
+  
+  printf("%d, %d \n", g, e);
+  printf("ans: %d \n", e*g);
+}
+

day_3/tobin.py

@@ -0,0 +1,8 @@
+
+inp = '01011'
+out = 0
+for i in range(0, len(inp)):
+    print(i, len(inp)-i-1)
+    if inp[i] == '1':
+        out = out | (1 << (len(inp)-i-1))
+print(out)