A7944.成绩

传送门

#include <bits/stdc++.h>
using namespace std;
unsigned long long a,b,c;
int main(int argc,char **argv){
    scanf("%lld %lld %lld",&a,&b,&c);
    a *= 0.2,b *= 0.3,c *= 0.5;
    printf("%lld",a + b + c); //累加求和
    return 0;
}