max of person's bids

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define N 10000
int main(void) {
  FILE *in = fopen("bids.txt", "r");
  if (!in) {
    exit(1);
  }
  char *names[N];
  int bids[N] = {0};
  int used = 0;
  for (char buf[BUFSIZ]; fgets(buf, BUFSIZ, in);) {
    char name[BUFSIZ];
    int bid;
    if (sscanf(buf, "%s%d", name, &bid) == 2) {
      int i = 0;
      for (; i < used; ++i) {
        if (!strcmp(names[i], name)) {
          break;
        }
      }
      if (i == used) {
        names[used++] = strdup(name);
      }
      if (bids[i] < bid) {
        bids[i] = bid;
      }
    }
  }
  fclose(in);
  FILE *out = fopen("output.txt", "w");
  if (!out) {
    exit(1);
  }
  for (int i = 0; i < used; ++i) {
    fprintf(out, "%s %d\n", names[i], bids[i]);
    free(names[i]);
  }
  fclose(out);
}