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- #include<iostream>
- #include<string>
- using namespace std;
- int main(){
- int n,k;
- string s;
- cin>>n>>k>>s;
- int sign;
- for(int i=0;i<n;i++){
- if(s.substr(0,i)==s.substr(n-i,i)){
- sign = i;
- }
- }
- for(int i=0;i<k-1;i++){
- cout<<s.substr(0,n-sign);
- }
- cout<<s<<endl;
- return 0;
- }
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