Submission #1225717

#	Time	Username	Problem	Language	Result	Execution time	Memory
1225717		guagua0407	Dungeons Game (IOI21_dungeons)	C++20	25 / 100	7055 ms	1115912 KiB

dungeons

#pragma GCC optimize("O4,unroll-loops,no-stack-protector")
#pragma GCC target("avx,avx2,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,fma")
#include "dungeons.h"
//#include "grader.cpp"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

namespace{
    const int mxn=4e5+5;
    const int inf=1e9;
    const int k=7;
    int N;
    vector<int> S,P,W,L;
    struct node{
        ll sum;
        int mn;
        int nxt;
    };
    inline node merge(node &a,node &b){
        node c;
        c.sum=a.sum+b.sum;
        c.nxt=b.nxt;
        c.mn=min(a.mn,(b.mn==inf?inf:max(0,(int)(b.mn-a.sum))));
        return c;
    }
    struct graph{
        int bound;
        node st[mxn][25];
        inline void build(int _bound){
            bound=_bound;
            for(int i=0;i<=N;i++){
                st[i][0].nxt=(S[i]>=bound?L[i]:W[i]);
                st[i][0].sum=(S[i]>=bound?P[i]:S[i]);
                if(S[i]>bound or i==N){
                    st[i][0].mn=S[i];
                }
                else{
                    st[i][0].mn=inf;
                }
            }
            for(int j=1;j<25;j++){
                for(int i=0;i<=N;i++){
                    st[i][j]=merge(st[i][j-1],st[st[i][j-1].nxt][j-1]);
                }
            }
        }
        inline pair<int,ll> solve(int x,ll z){
            if(z>=S[x]){
                return {x,z};
            }
            node c;
            c.sum=(S[x]>=bound?P[x]:S[x]);
            c.nxt=(S[x]>=bound?L[x]:W[x]);
            c.mn=inf;
            for(int t=24;t>=0;t--){
                int cur=c.nxt;
                if(z+c.sum<st[cur][t].mn){
                    c.nxt=st[cur][t].nxt;
                    c.sum+=st[cur][t].sum;
                }
            }
            int cur=c.nxt;
            z+=c.sum;
            return make_pair(cur,z);
        }
    };
    graph G[k];
}

void init(int _n, std::vector<int> _S, std::vector<int> _P, std::vector<int> _w, std::vector<int> _l) {
    auto st=clock();
    N=_n;
    S=_S;
    P=_P;
    W=_w;
    L=_l;
    S.push_back(0);
    P.push_back(0);
    W.push_back(N);
    L.push_back(N);
    for(int i=0;i<k;i++){
        G[i].build(1<<(i*4));
    }
	return;
}

long long simulate(int x, int Z) {
    ll z=Z;
    //cout<<'\n';
    while(x!=N){
        int t=min(k-1,(int)__lg(z)/4);
        tie(x,z)=G[t].solve(x,z);
        if(x==N) return z;
        if(z>=S[x]){
            z+=S[x];
            x=W[x];
        }
        else{
            z+=P[x];
            x=L[x];
        }
        if(x==N) return z;
    }
	return z;
}

• Subtask 1: 0 / 11
• Subtask 2: 0 / 26
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 0 / 27
• Subtask 6: 0 / 11