This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
char last;
vector<string> v;
void Init() {
v.push_back("");
}
void TypeLetter(char L) {
v.push_back(v.back() + L);
}
void UndoCommands(int U) {
v.push_back(v[v.size() - U - 1]);
}
char GetLetter(int P) {
return v.back()[P];
}
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