const int N = 1e6 + 5;
const int LOG = 21;
int cnt,back[N][LOG + 1],sz[N];
char ch[N];
void Init() {
}
void TypeLetter(char L) {
cnt++;
back[cnt][0] = cnt - 1;
for (int i = 1 ; i <= LOG ; i++)
back[cnt][i] = back[back[cnt][i - 1]][i - 1];
sz[cnt] = sz[cnt - 1] + 1;
ch[cnt] = L;
}
void UndoCommands(int U) {
cnt++;
back[cnt][0] = cnt - U - 1;
for (int i = 1 ; i <= LOG ; i++)
back[cnt][i] = back[back[cnt][i - 1]][i - 1];
sz[cnt] = sz[cnt - U - 1];
ch[cnt] = ch[cnt - U - 1];
}
char GetLetter(int P) {
P++;
int x = cnt;
for (int i = LOG ; i >= 0 ; i--)
if (sz[back[x][i]] >= P)
x = back[x][i];
return ch[x];
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
256 KB |
Output is correct |
2 |
Correct |
2 ms |
384 KB |
Output is correct |
3 |
Correct |
2 ms |
384 KB |
Output is correct |
4 |
Correct |
2 ms |
256 KB |
Output is correct |
5 |
Correct |
2 ms |
384 KB |
Output is correct |
6 |
Correct |
2 ms |
384 KB |
Output is correct |
7 |
Correct |
2 ms |
384 KB |
Output is correct |
8 |
Correct |
2 ms |
256 KB |
Output is correct |
9 |
Correct |
3 ms |
384 KB |
Output is correct |
10 |
Correct |
3 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
3 ms |
384 KB |
Output is correct |
2 |
Correct |
2 ms |
384 KB |
Output is correct |
3 |
Correct |
2 ms |
256 KB |
Output is correct |
4 |
Correct |
2 ms |
384 KB |
Output is correct |
5 |
Correct |
2 ms |
384 KB |
Output is correct |
6 |
Correct |
2 ms |
384 KB |
Output is correct |
7 |
Correct |
3 ms |
384 KB |
Output is correct |
8 |
Correct |
2 ms |
384 KB |
Output is correct |
9 |
Correct |
3 ms |
384 KB |
Output is correct |
10 |
Correct |
2 ms |
384 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
512 KB |
Output is correct |
2 |
Correct |
4 ms |
540 KB |
Output is correct |
3 |
Correct |
4 ms |
768 KB |
Output is correct |
4 |
Correct |
2 ms |
768 KB |
Output is correct |
5 |
Correct |
4 ms |
640 KB |
Output is correct |
6 |
Correct |
5 ms |
768 KB |
Output is correct |
7 |
Correct |
4 ms |
768 KB |
Output is correct |
8 |
Correct |
4 ms |
768 KB |
Output is correct |
9 |
Correct |
4 ms |
768 KB |
Output is correct |
10 |
Correct |
4 ms |
768 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
768 ms |
65760 KB |
Output is correct |
2 |
Correct |
938 ms |
80044 KB |
Output is correct |
3 |
Correct |
623 ms |
79312 KB |
Output is correct |
4 |
Correct |
767 ms |
83120 KB |
Output is correct |
5 |
Correct |
827 ms |
73464 KB |
Output is correct |
6 |
Correct |
469 ms |
86708 KB |
Output is correct |
7 |
Execution timed out |
1052 ms |
57524 KB |
Time limit exceeded |
8 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Execution timed out |
1047 ms |
53028 KB |
Time limit exceeded |
2 |
Halted |
0 ms |
0 KB |
- |