include

include

using namespace std;

int max_of_four(int a, int b, int c, int d){ int max = 0;

    if (a >= max){
        max = a;
    }
    if (b >= max){
        max = b;
    }
    if (c >= max){
        max = c;   
    }
    if (d >= max){
        max = d;
    }
    return max;

}

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;

}

YOU HAVE TO STORE GRT NUM IN INT AND THEN RETURN IT

include

include

using namespace std;

/* Add int max_of_four(int a, int b, int c, int d) here. */ int max_of_four(int a, int b, int c, int d) { int great; if( a>b && a>c && a>d) { great =a; } else if(b>a && b>c && b>d) { great =b; } else if(c>a && c>b && c>d) { great = c; } else{

    great = d;
     }
return great ;

}

include

include

using namespace std;

int max_of_four(int a, int b, int c, int d) {

return max(max(a,b),max(c,d));

}

int main() {

int a;
int b;
int c;
int d;
cin>>a>>b>>c>>d;
cout<<max_of_four(a,b,c,d);


return 0;

}

int max_of_four(int a,int b,int c,int d){ int answ = max({a,b,c,d}); return answ; }