看看这个，这是AC代码，挺诡异的

#include<bits/stdc++.h>
#define int long long
#define I_love_ch ios::sync_with_stdio(0)
#define China cin.tie(0)
#define France cout.tie(0)
#define ch_France return 0
using namespace std;
int n,m,a[1000010],vis[1000010],b[1000010],c[1000010];
signed main(){
	I_love_ch;
	China;
	France;
	cin>>n>>m;
	for(int i=1;i<=n;i++){
		cin>>a[i]>>vis[i];
	}
	for(int i=1;i<=m;i++){
		cin>>b[i]>>c[i];
	}
	double ans=0;
	for(int i=1;i<=n;i++){
		if(vis[i]==1) ans=ans+a[i]*80;
		else ans+=a[i]*100;
	}
	ans/=100;
	int res=0,minn=1e18;
	for(int i=1;i<=n;i++){
		res+=a[i];
	}
	for(int i=1;i<=m;i++){
		if(b[i]<=ans) minn=min(minn,res-c[i]);
		else minn=min(minn,res);
	}
	if(minn<=ans) cout<<minn<<".00"<<endl;
	else printf("%.2lf\n",ans);
	ch_France;
}