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>
#define fi first
#define se second
using namespace std;
vector<pair<int,char>> v;
string cur;
bool ok = false;
void Init() {}
void TypeLetter(char L) {
v.push_back({-1,L});
}
void UndoCommands(int U) {
v.push_back({U,' '});
}
char GetLetter(int P) {
if(ok == false) {
ok = true;
int cnt = 0;
for(int i = v.size()-1; i >= 0; i--) {
if(cnt > 0) {
cnt--; continue;
}
if(v[i].first == -1) {
cur.push_back(v[i].second);
}
else {
cnt = v[i].first;
}
}
}
return cur[P];
}
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