#include <stdio.h>

int main(int argc, char ** argv)
{
  int x, y, z;
  char dummy;

  if (argc != 4 ||
      sscanf(argv[1], "%d %c", &x, &dummy) != 1 ||
      sscanf(argv[2], "%d %c", &y, &dummy) != 1 ||
      sscanf(argv[3], "%d %c", &z, &dummy) != 1) {
    fprintf(stderr, "error\n");
    return -1;
  }

  printf("%d\n", x < y != x < z ? x : y < z != y < x ? y : z);

  return 0;
}