求助！

quzijie @ 2022-08-25 00:13:13

by quzijie @ 2022-08-25 00:13:43

#include<bits/stdc++.h>
using namespace std;
long long n,q,a[1000000],s,t,x,y,p,mi,e=1;
int main()
{
    cin>>n>>q;
    for(int i=1; i<=n; i++)
    {
        cin>>a[i];
    }
    sort(a+1,a+n+1);
    mi=a[n];
    for(int i=1; i<=q; i++)
    {
        cin>>s>>t;
        for(int j=1; j<=n; j++)
        {
            p=a[j];
            for(int b=1; b<=s; b++)
            {
                x=p%10;
                y+=x*e;
                p=p/10;
                x=0;
                e*=10;
            }
            if(mi>a[j]&&y==t) mi=a[j];
        }
        if(mi==a[n])
        {
            cout<<"-1"<<endl;
        }
        else cout<<mi<<endl;
        y=0;
        mi=a[n];
        e=1;
    }

    return 0;
}

by SamHJD @ 2022-08-25 08:40:22

试试用字符串做,判断方便一点