func_in_c.c

#include <stdio.h>

int max_of_four(int a, int b, int c, int d) {
    int max1, max2;
    
    max1 = (a > b) ? a : b;
    max2 = (c > d) ? c : d;
  
    return (max1 > max2) ? max1 : max2;
}


int main() {
    int a, b, c, d;
    scanf("%d %d %d %d", &a, &b, &c, &d);
    int ans = max_of_four(a, b, c, d);
    printf("%d", ans);
    
    return 0;
}