71 lines
1.6 KiB
C
71 lines
1.6 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <math.h>
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#define ROW_LENGTH 120
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// array of card multipliers?
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// for multiplier: next hit multipliers ++
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int main ()
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{
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FILE *input;
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input = fopen("./input", "r");
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int offset = 0;
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char c;
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int score = 0;
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int cardId = 0;
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int cardMultipliers[250] = {0};
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char row[ROW_LENGTH];
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// for each card (row in file) (numbers start after :)
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while (fgets(row, ROW_LENGTH, input) != NULL) {
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cardMultipliers[cardId]++;
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int winningNumbers[10] = {0};
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int hits = 0;
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printf("%s\n", row);
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// offset = (strchr(row, '|') - &row[0]) - 2;
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offset = (strchr(row, ':') - &row[0] + 1);
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int foundNumbers = 0;
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for (int i = 0; row[offset + i] != '|'; i++) {
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if (isdigit(row[offset + i])) {
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while (isdigit(c = row[offset + i])) {
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winningNumbers[foundNumbers] = winningNumbers[foundNumbers] * 10 + (c - '0');
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i++;
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}
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i--;
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printf("number %d: %d\n", foundNumbers, winningNumbers[foundNumbers]);
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foundNumbers++;
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}
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}
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offset = (strchr(row, '|') - &row[0] + 1);
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for (int i = 0; row[offset + i] != '\n'; i++) {
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if (isdigit(row[offset + i])) {
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int num = 0;
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while (isdigit(c = row[offset + i])) {
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num = num * 10 + (c - '0');
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i++;
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}
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for (int i = 0; i < 10; i++) {
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if (num == winningNumbers[i]) hits++;
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}
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i--;
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}
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}
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printf("hits = %d\n", hits);
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for (int i = 0; i < cardMultipliers[cardId]; i++) {
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for (int n = 1; n <= hits; n++) {
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cardMultipliers[cardId + n]++;
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}
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}
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cardId++;
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}
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for (int i = 0; i < 250; i++) score += cardMultipliers[i];
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printf("total cards: %d\n", score);
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}
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