70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#include <stdio.h>
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#define SIZE 1000
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struct Claim {
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int left;
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int top;
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int width;
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int height;
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int id;
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};
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struct Claim parseClaim(char line[25]) {
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struct Claim claim;
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sscanf(line, "#%d @ %d,%d: %dx%d", &claim.id, &claim.left, &claim.top, &claim.width, &claim.height);
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return claim;
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}
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void resetFields(int fabric [SIZE][SIZE]) {
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for (int i=0; i<SIZE; i++) {
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for (int j=0; j<SIZE; j++) {
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fabric[i][j] = 0;
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}
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}
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}
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void setFields(struct Claim claim, int fabric [SIZE][SIZE]) {
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for (int i=claim.left; i<claim.left+claim.width; i++) {
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for (int j=claim.top; j<claim.top+claim.height; j++) {
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fabric[i][j] += 1;
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}
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}
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}
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int verifyClaim(struct Claim claim, int fabric [SIZE][SIZE]) {
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for (int i=claim.left; i<claim.left+claim.width; i++) {
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for (int j=claim.top; j<claim.top+claim.height; j++) {
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if (fabric[i][j] != 1) {
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return 0;
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}
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}
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}
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return 1;
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}
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int main() {
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int fabric [SIZE][SIZE];
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FILE* input = fopen("input", "r");
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char line [25];
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// Looks like int[][] isn’t initialized to 0
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resetFields(fabric);
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int i = 0;
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while (fgets(line, sizeof(line), input)) {
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struct Claim claim = parseClaim(line);
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setFields(claim, fabric);
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}
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input = fopen("input", "r");
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while (fgets(line, sizeof(line), input)) {
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struct Claim claim = parseClaim(line);
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if (verifyClaim(claim, fabric) == 1) {
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printf("Valid claim: %d\n", claim.id);
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return 0;
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}
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}
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return 0;
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}
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