#define _CRT_SECURE_NO_WARNINGS #include<stdio.h> int max(int x,int y) { if(x>y) return x; else return y; } int main() { int a,b,c,d; scanf("%d %d %d %d\n",&a,&b,&c,&d); printf("%d",max(max(a,b),max(c,d))); return 0; }