Diff

#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
int main(int argc, char **argv) {
  FILE *sample = fopen(argv[1], "r");
  FILE *input = fopen(argv[2], "r");
  int x, y, min = INT_MAX, s[6], in[4], cand;
  fscanf(input, "%d,%d,%d,%d", &in[0], &in[1], &in[2], &in[3]);
  while (fscanf(sample, "%d,%d,%d,%d,%d,%d",
    &s[0], &s[1], &s[2], &s[3], &s[4], &s[5]) != EOF) {
    cand = (s[2] - in[0]) * (s[2] - in[0]) +
      (s[3] - in[1]) * (s[3] - in[1]) +
      (s[4] - in[2]) * (s[4] - in[2]) +
      (s[5] - in[3]) * (s[5] - in[3]);
    if (min > cand) {
      min = cand;
      x = s[0];
      y = s[1];
    }
  }
  fclose(sample);
  fclose(input);
  printf("%d,%d\n", x, y);
  return 0;
}