
```cpp
#include<iostream>
#include<algorithm>
#include<vector>
#include<cstdio>
using namespace std;
int n,c;
struct node{
    double kg,money;
}grass[110];
bool cmp(node x,node y){
    return x.money/x.kg > y.money/y.kg;
}
int main(){
    cin>>n>>c;
    for(int i = 1;i<=n;i++) cin>>grass[i].kg>>grass[i].money;
    sort(grass+1,grass+n+1,cmp);
    double ans = 0;
    for(int i = 1;c>0;i++){
        if(c>=grass[i].kg){
            ans+=grass[i].money;
            c-=grass[i].kg;
        }
        else{
            ans+=grass[i].money/grass[i].kg*c;
            c = 0;
        }
    }
    printf("%.2f",ans);
    return 0;
}
```


#include<bits/stdc++.h>
using namespace std;
int a[110],b[110];
int n;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++) cin>>a[i];
    for(int i=1;i<=n;i++) cin>>b[i];
    sort(a+1,a+n+1);
    sort(b+1,b+n+1);
    int cnt=0;
    int j=1;
    for(int i=1;i<=n&&j<=n;i++,j++){
        while(i<=n&&b[j]>=a[i]){
            i++;
        }
        if(i<=n) cnt++;
    }
    cout<<(2*cnt-n)*200;
}

变量输入输出

#include<bits/stdc++.h>
using namespace std;
int a[110],b[110];
int n;
int main(){
cin>>n;
for(int i=1;i<=n;i++) cin>>a[

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