20分求助

phr0720 @ 2024-09-08 13:28:02

#include<bits/stdc++.h>
using namespace std;
string s;
string str; 
int main() {
    int q;
    cin>>q;
    cin>>s;
while(q--){
    int op,a,b;
    cin>>op;
    if(op==1){
        cin>>str;
        s+=str;
        cout<<s<<endl;
    }
    if(op==2){
        cin>>a>>b;
        s=s.substr(a,b);
        cout<<s<<endl;
    }
    if(op==3){
        cin>>a>>str;
        s.insert(a,str);
        cout<<s<<endl;
    }
    if(op==4){
        cin>>str;
        for(int i=1;i<=s.size();i++){
            if(s.find(str)!=NULL){
                cout<<s.find(str);
                break;
            }
            else{
                cout<<"-1";
                return 0;
            }
        }
    }
}
    return 0;
}

by bluedemmo @ 2024-09-08 17:27:01

@phr0720

#include<bits/stdc++.h>
using namespace std;

int n;

int x;

int a,b;

string str;
string s;

int main(){

    cin>>n;
    cin>>s;

    for(int k=1;k<=n;k++)
    {
        cin>>x;

        if(x==1)
        {
            cin>>str;
            s=s+str;
            cout<<s<<"\n";
        }
        else if(x==2)
        {
            cin>>a>>b;
            string tmp="";
            for(int i=a;i<b+a;i++)
            {
                tmp+=s[i];
            }
            s=tmp;
            cout<<s<<"\n";
        }
        else if(x==3)
        {
            cin>>a;
            cin>>str;
            string s2="",s3="";
            for(int i=0;i<a;i++)
            {
                s2+=s[i];
            }
            for(int i=a;i<s.length();i++)
            {
                s3+=s[i];
            }
            s=s2+str+s3;
            cout<<s<<"\n";

        }
        else if(x==4)
        {
            cin>>str;
            bool f=1;
            for(int i=0;i<s.length();i++)
            {
//              cout<<s[i]<<"|"<<str[0]<<" ";
                if(s[i]==str[0])
                {
                    string s4="";
                    for(int j=i;j<i+str.length();j++)
                    {
                        s4+=s[j];
                    }
//                    cout<<"*"<<s4;
                    if(s4==str)
                    {
                        f=0;
                        cout<<i<<"\n";
                        break;
                    }
                }
            }

            if(f)cout<<-1<<"\n";

        }

    }

    return 0;
}

回关？

by bluedemmo @ 2024-09-08 17:27:29

@phr0720 大色狼柯南？

by phr0720 @ 2024-09-08 18:50:10

@zhushengnan谢谢大佬，此题已过，谢谢，此帖结。