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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5. string a="def";
  6. for(int i=0;i<3;i++){
  7. cout<<a[i];
  8. for(int j=0;j<=i;j++){
  9. cout<<a[j];
  10. }
  11. }
  12. return 0;
  13. }
Success #stdin #stdout 0.01s 5508KB
stdin
Standard input is empty
stdout
ddedefdef