【2017NOIP普及组】T1 成绩

P3954 成绩
题目传送门
方法一：

#include<cstdio>
#include<iostream>
#include<cmath>
#include<cstring>
#include<string>
#include<algorithm>
#include<vector>
#define fre(x) freopen(#x".in","r",stdin),freopen(#x".out","w",stdout);
using namespace std;
const int MAX=2147483647;
const int N=1e6;
double a,b,c;
int main()
{
	//fre();
	cin>>a>>b>>c;
	cout<<a*0.2+b*0.3+c*0.5;
	return 0;
}

方法二：

#include<cstdio>
#include<iostream>
#include<cmath>
#include<cstring>
#include<string>
#include<algorithm>
#include<vector>
#define fre(x) freopen(#x".in","r",stdin),freopen(#x".out","w",stdout);
using namespace std;
const int MAX=2147483647;
const int N=1e6;
int main()
{
	//fre();
	int ans,a,b,c;
	scanf("%d%d%d",&a,&b,&c);
	ans=a*2/10+b*3/10+c*5/10;
	cout<<ans;
	return 0;
}