来警醒一下自己

-=不要写反；

先踢出优先缓存，之后如果有订单的话在+2；

#include<bits/stdc++.h>
using namespace std;
struct shop{
    int time=0;int num=0;
};
int sum=0;
shop s[100005];
vector<int> ti[100005];
bool vis[100005]={0};
int main()
{
    int n,m,t,time,num;
    cin>>n>>m>>t;
    for(int i=1;i<=m;i++){
        cin>>time>>num;
        ti[time].push_back(num);
    }
    for(int i=1;i<=t;i++){
        for(int j=0;j<ti[i].size();j++){
            if(ti[i][j]==0)continue;
            if(s[ti[i][j]].time<=i-1){
                s[ti[i][j]].num-=(i-s[ti[i][j]].time-1);
                if(s[ti[i][j]].num<0)s[ti[i][j]].num=0;
            }
            if(s[ti[i][j]].num<=3)vis[ti[i][j]]=0;
            s[ti[i][j]].num+=2;
            if(s[ti[i][j]].num>5)vis[ti[i][j]]=1;
            s[ti[i][j]].time=i;
        }
    }
    int ans=0;
    for(int i=1;i<=n;i++)
    {
        s[i].num-=(t-s[i].time);
        if(s[i].num>5)vis[i]=1;
        if(s[i].num<=3)vis[i]=0;
         if(vis[i])ans++;
    }
    cout<<ans;
    return 0;
}