Submission #1217971

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217971		hengliao	Dungeons Game (IOI21_dungeons)	C++20	50 / 100	7091 ms	420784 KiB

dungeons

#include "dungeons.h"
#include<bits/stdc++.h>
using namespace std;

#define F first
#define S second
#define pb push_back
#define vll vector<ll>
#define pll pair<ll, ll>

typedef long long ll;

namespace{
    const ll mxN=4e5+5;
    const ll LOG=21;
    const ll inf=1e18;

    ll n;
    ll s[mxN], p[mxN], w[mxN], l[mxN];
    array<ll, 3> up1[mxN][LOG]; // des, atleast, sum
    array<ll, 3> up2[mxN][LOG];

    array<ll, 3> mrg1(array<ll, 3> a, array<ll, 3> b){
        array<ll, 3> re;
        re[0]=b[0];
        re[1]=max(a[1], b[1]-a[2]);
        re[2]=a[2]+b[2];
        return re;
    }

    array<ll, 3> mrg2(array<ll, 3> a, array<ll, 3> b){
        array<ll, 3> re;
        re[0]=b[0];
        re[1]=min(a[1], b[1]-a[2]);
        re[2]=a[2]+b[2];
        return re;
    }
}

void init(int N, vector<int> S, vector<int> P, vector<int> W, vector<int> L) {
	n=N;
    for(ll i=0;i<=n;i++){
        s[i]=S[i];
        p[i]=P[i];
        w[i]=W[i];
        l[i]=L[i];
    }
    for(ll i=0;i<n;i++){
        up1[i][0]={w[i], s[i], s[i]};
        up2[i][0]={l[i], s[i]-1, p[i]};
    }
    up1[n][0]={n, 0, 0};
    up2[n][0]={n, inf, 0};
    for(ll j=1;j<LOG;j++){
        for(ll i=0;i<=n;i++){
            up1[i][j]=mrg1(up1[i][j-1], up1[up1[i][j-1][0]][j-1]);
            up2[i][j]=mrg2(up2[i][j-1], up2[up2[i][j-1][0]][j-1]);
        }
    }
}

long long simulate(int x, int z) {
	ll ans=z;
    while(x!=n){
        if(ans>=s[x]){
            for(ll i=LOG-1;i>=0;i--){
                if(ans>=up1[x][i][1]){
                    ans+=up1[x][i][2];
                    x=up1[x][i][0];
                }
            }    
        }
        else{
            for(ll i=LOG-1;i>=0;i--){
                if(ans<=up2[x][i][1]){
                    ans+=up2[x][i][2];
                    x=up2[x][i][0];
                }
            }
        }
    }
    return ans;
}

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