题解 | 游游的字母翻倍
游游的字母翻倍
https://www.nowcoder.com/practice/cd02bff88b6f4f4fba264dccdb78705d
#include <bits/stdc++.h>
using namespace std;
using ll=long long;
int main() {
ll n,q;
cin>>n>>q;
string s;
cin>>s;
while(q--){
ll l,r;
cin>>l>>r;
ll j=l;
for(ll i=l;i<=r;i++){
s.insert(j,1,s[j-1]);
j+=2;
}
}
cout<<s<<endl;
return 0;
}