Submission #230807

#	Time	Username	Problem	Language	Result	Execution time	Memory
230807		arbor	Crayfish scrivener (IOI12_scrivener)	C++14	0 / 100	637 ms	63664 KiB

scrivener

#include <bits/stdc++.h>

#define all(x) x.begin(), x.end()
#define lc (i << 1)
#define rc (i << 1 | 1)
using namespace std;
using ll = long long;
using pii = pair<int, int>;
const int MN = 1e6 + 5, LN = 17, MOD = 1e9 + 7, INF = 0x3f3f3f3f, BSZ = 320;
char s[MN];
int spt[MN][20], dep[MN];
int cur;

void Init() {
    
}

void TypeLetter(char L) {
    cur++;
    s[cur] = L;
    spt[cur][0] = cur - 1;
    dep[cur] = dep[cur - 1] + 1;
    for (int j = 1; j < LN; j++)
        spt[cur][j] = spt[spt[cur][j - 1]][j - 1];
}

void UndoCommands(int U) {
    int last = cur - U;
    cur++;
    s[cur] = s[last];
    int par = spt[last][0];
    spt[cur][0] = par;
    dep[cur] = dep[par] + 1;
    for (int j = 1; j < LN; j++)
        spt[cur][j] = spt[spt[cur][j - 1]][j - 1];
}

char GetLetter(int P) {
    int now = cur;
    for (int j = LN - 1; j >= 0; j--)
        if (dep[spt[now][j]] >= P)
            now = spt[now][j];
    return s[now];
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 7
• Subtask 3: 0 / 22
• Subtask 4: 0 / 26
• Subtask 5: 0 / 40