제출 #1131767

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1131767		t9unkubj	Crayfish scrivener (IOI12_scrivener)	C++20	34 / 100	896 ms	298720 KiB

scrivener

#ifdef t9unkubj
#include"debug.cpp"
//#include"template_no_debug.h"
#else 
#define dbg(...) 199958
#endif

#undef _GLIBCXX_DEBUG
#pragma GCC optimize("O3")
using namespace std;
#include<bits/stdc++.h>
using ll=long long;
using ull=unsigned long long;
template<class T>using vc=vector<T>;
template<class T>using vvc=vc<vc<T>>;
#define rep(i,n) for(ll i=0;i<(ll)(n);i++)
#define REP(i,j,n) for(ll i=(j);i<(ll)(n);i++)
#define DREP(i,n,m) for(ll i=(n);i>=(m);i--)
#define drep(i,n) for(ll i=((n)-1);i>=0;i--)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
template<class T,class F>
bool chmin(T &x, F y){
    if(x>y){
        x=y;
        return true;
    }
    return false;
}
template<class T, class F>
bool chmax(T &x, F y){
    if(x<y){
        x=y;
        return true;
    }
    return false;
}
double pass_time=0;
const int LOG=19;
struct Node{
    int sz;
    char in;
    vc<int>nxt;
    vc<array<int,LOG>>come_jump;
    vc<array<int,LOG>>come_idx;
    array<int,LOG>jump;
    Node():sz(),jump(),nxt(),come_jump(),come_idx(),in(){}
};
vc<Node>node;
void make(int x){
    REP(i,1,LOG){
        auto J=node[x].jump[i-1];
        node[x].jump[i]=node[J].jump[i-1];
    }
}
void make2(int x,int idx){
    REP(i,1,LOG){
        auto I=node[x].come_idx[idx][i-1];
        auto J=node[x].come_jump[idx][i-1];
        node[x].come_jump[idx][i]=node[J].come_jump[I][i-1];
        node[x].come_idx[idx][i]=node[J].come_idx[I][i-1];
    }
}
char last;
int now;

int T=0;
int nw(){
    node.emplace_back();
    return T++;
}
void Init() {

    now=nw();
    node[now].sz=0;
    node[now].come_jump.push_back({});
    node[now].come_idx.push_back({});
    rep(i,LOG){
        node[now].jump[i]=now;
        node[now].come_jump[0][i]=now;
        node[now].come_idx[0][i]=0;
    }
}
void TypeLetter(char L) {
    int nxt=nw();
    node[nxt].in=L;
    node[nxt].sz=node[now].sz+1;
    node[nxt].come_jump.push_back({});
    node[nxt].come_idx.push_back({});
    node[nxt].come_idx[0][0]=node[now].nxt.size();
    node[nxt].come_jump[0][0]=now;
    
    node[nxt].jump[0]=now;
    
    node[now].nxt.push_back(nxt);
    make(nxt);
    make2(nxt,0);

    now=nxt;
}

void UndoCommands(int U) {
    auto tmp=now;
    int nxt_idx=node[tmp].come_jump.size()-1;
    int t=0;
    while(U){
        if(U&1){
            auto mada=node[tmp].come_idx[nxt_idx][t];
            tmp=node[tmp].come_jump[nxt_idx][t];
            nxt_idx=mada;
        }
        t++;
        U/=2;
    }
    node[tmp].come_jump.push_back({});
    node[tmp].come_idx.push_back({});
    
    int V=node[tmp].come_jump.size()-1;
    node[tmp].come_jump[V][0]=now;
    node[tmp].come_idx[V][0]=node[now].nxt.size();
    make2(tmp,V);
    node[now].nxt.emplace_back(tmp);
    now=tmp;
}

char GetLetter(int P) {
    ++P;
    auto NOW=now;
    int t=0;
    P=node[now].sz-P;
    while(P){
        if(P&1)NOW=node[NOW].jump[t];
        t++;
        P/=2;
    }
    return node[NOW].in;
}

namespace judge{
    void run(){
        Init();
        int q;
        cin>>q;
        while(q--){
            int t;
            cin>>t;
            if(t==1){
                char L;
                cin>>L;
                TypeLetter(L);
            }
            if(t==2){
                int U;
                cin>>U;
                UndoCommands(U);
            }
            if(t==3){
                int P;
                cin>>P;
                cout<<GetLetter(P)<<endl;
            }
        }
    }
};
//int main(){judge::run();}
/*
g++ env/scrivener.cpp -D t9unkubj
19
1 A
1 B
1 C
1 D
3 2 
2 2
3 2 
3 1 
1 E
1 F 
3 3 
3 1 
2 3
3 4 
3 3 
3 2 
2 2
3 1 
3 2 

*/
/*
12
1 A
1 B
1 C
1 D

3 2 (ans==B)
2 2

3 2 (ans==B)
3 1 (ans==A)

1 E
1 F 

3 3 (ans==E)
3 1 (ans==A)

2 3

3 4 (ans==D)
3 3 (ans==C)
3 2 (ans==B)

2 2
3 1 (ans==A)
3 2 (ans==B)
*/

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