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Submission #98737

# Submission time Handle Problem Language Result Execution time Memory
98737 2019-02-25T13:45:44 Z Alexa2001 Crayfish scrivener (IOI12_scrivener) C++17
5 / 100
 417 ms 65696 KB 
#include <bits/stdc++.h>

using namespace std;

const int Nmax = 1e6 + 5, lg = 20;

int nodes, t[lg+2][Nmax], up[Nmax], frst_up[Nmax];
char letter[Nmax];

void Init()
{
}

void TypeLetter(char L)
{
    letter[++nodes] = L;
    t[0][nodes] = nodes - 1;
    up[nodes] = up[nodes - 1] + 1;
    frst_up[nodes] = nodes;

    int i;
    for(i=1; i<=lg; ++i)
        t[i][nodes] = t[i-1][t[i-1][nodes]];
}

void UndoCommands(int U)
{
    int cursor = nodes - U, i;

    t[0][nodes + 1] = cursor;
    up[++nodes] = up[cursor];
    frst_up[nodes] = frst_up[cursor];
}

char GetLetter(int P)
{
    int i, x = frst_up[nodes]; ++P;
    for(i=lg; i>=0; --i)
        if(up[t[i][x]] >= P) x = t[i][x];
    return letter[x];
}

Compilation message

scrivener.cpp: In function 'void UndoCommands(int)':
scrivener.cpp:28:29: warning: unused variable 'i' [-Wunused-variable]
     int cursor = nodes - U, i;
                             ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB Output is correct
2 Correct 2 ms 512 KB Output is correct
3 Correct 3 ms 512 KB Output is correct
4 Correct 2 ms 512 KB Output is correct
5 Correct 2 ms 512 KB Output is correct
6 Correct 2 ms 512 KB Output is correct
7 Correct 3 ms 512 KB Output is correct
8 Correct 2 ms 512 KB Output is correct
9 Correct 3 ms 512 KB Output is correct
10 Correct 3 ms 484 KB Output is correct

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 512 KB Output is correct
2 Incorrect 2 ms 512 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #3
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 640 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# Verdict Execution time Memory Grader output
1 Incorrect 324 ms 65696 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 40.0

# Verdict Execution time Memory Grader output
1 Incorrect 417 ms 60328 KB Output isn't correct
2 Halted 0 ms 0 KB -