求大神帮助

guoyichen_guoyichen @ 2024-10-11 21:35:25

by guoyichen_guoyichen @ 2024-10-11 21:43:12

新手不懂如何发代码

by 7wny @ 2024-10-13 16:03:58

哪道题

by guoyichen_guoyichen @ 2024-10-14 15:16:04

3955

by guoyichen_guoyichen @ 2024-10-14 16:10:24

by 7wny @ 2024-10-14 21:07:45

#include<bits/stdc++.h>
using namespace std;
int n,q,len,a[1000005],s;
int main(){
//  freopen("librarian.in","r",stdin);
//  freopen("librarian.out","w",stdout);
    scanf("%d%d",&n,&q);
    for(int i=1;i<=n;i++)scanf("%d",&a[i]);
    sort(a+1,a+n+1);
    for(int i=1;i<=q;i++){
        scanf("%d%d",&len,&s);
        int j;
        for(j=1;j<=n;j++)if(a[j]%(int)pow(10,len)==s){printf("%d\n",a[j]);break;}
        if(j>n)printf("-1\n");
    }
//  fclose(stdin);fclose(stdout);
    return 0;
}

by kimigzr @ 2024-10-25 16:26:29

#include<bits/stdc++.h>
using namespace std;
int book[1010];
long long request;
int table[10000010];
int main(){
    //freopen("librarian.in","r",stdin);
    //freopen("librarian.out","w",stdout);
    int n,q,l;
    cin>>n>>q;
    for(int i=1;i<=n;i++) cin>>book[i];
    sort(book+1,book+n);
    for(int i=n;i>=1;i--){
        int c=book[i];
        while(c){
            table[c]=i;
            c=c%int(pow(10,int(log10(c))));
        }
    }
    book[0]=-1;
    for(int i=0;i<q;i++){
        cin>>l>>request;
        cout<<book[table[request]]<<endl;
    }
    return 0;
}