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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
int main(int argc, char *argv[])
{
if (argc != 2) {
printf("Usage: ./depth <input-file>\n");
exit(EXIT_FAILURE);
}
FILE *fp;
char *buffer;
ssize_t read;
size_t len = 0;
fp = fopen(argv[1], "r");
if (fp == NULL) {
perror("fopen");
exit(EXIT_FAILURE);
}
int inc = 0;
int curr = 0;
uint8_t idx = 0;
int side = 0;
int depth[3] = { 0, 0, 0 };
read = getline(&buffer, &len, fp);
if (read != -1) {
depth[0] = atoi(buffer);
}
read = getline(&buffer, &len, fp);
if (read != -1) {
curr = atoi(buffer);
depth[0] += curr;
depth[1] = curr;
}
read = getline(&buffer, &len, fp);
if (read != -1) {
curr = atoi(buffer);
depth[0] += curr;
depth[1] += curr;
depth[2] = curr;
}
while ((read = getline(&buffer, &len, fp)) != -1) {
side = depth[idx];
depth[idx] = 0;
idx = (idx + 1) % 3;
curr = atoi(buffer);
depth[0] += curr;
depth[1] += curr;
depth[2] += curr;
if (depth[idx] > side) {
inc++;
}
}
fclose(fp);
if (buffer) {
free(buffer);
}
printf("%d", inc);
return 0;
}
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