Submission #673489

#	Time	Username	Problem	Language	Result	Execution time	Memory
673489		Do_you_copy	Crayfish scrivener (IOI12_scrivener)	C++17	100 / 100	366 ms	67176 KiB

scrivener

//Then
#include <bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define faster ios_base::sync_with_stdio(0); cin.tie(0);
 
using namespace std;
using ll = long long;
using ld = long double;
using pii = pair <int, int>;
mt19937_64 Rand(chrono::steady_clock::now().time_since_epoch().count());
const int maxN = 1e6 + 10;
//const int Mod = 1e9 + 7;
//const int inf =
int q;
int pos[maxN], cnt, cnt1;
int depth[maxN];
int lift[maxN][20];
char s[maxN];
 
void Init(){}
 
void TypeLetter(char c){
    pos[++cnt1] = ++cnt;
    lift[cnt][0] = pos[cnt1 - 1];
    for (int i = 1; i < 20; ++i){
        lift[cnt][i] = lift[lift[cnt][i - 1]][i - 1];
    }
    depth[cnt] = depth[pos[cnt1 - 1]] + 1;
    s[cnt] = c;
}
 
void UndoCommands(int x){
    ++cnt1;
    pos[cnt1] = pos[cnt1 - x - 1];
}
 
char GetLetter(int x){
    int u = pos[cnt1];
    int k = depth[u] - x - 1;
    while (k){
        int t = __builtin_ctz(k);
        u = lift[u][t];
        k -= 1 << t;
    }
    return s[u];
}

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