oj.uz

답안 #1008990

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1008990 2024-06-27T07:35:13 Z vjudge1 Fountain (eJOI20_fountain) C++17
100 / 100
 146 ms 45840 KB 
#include <bits/stdc++.h>
 
#define suiii ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define ll long long
#define co cout<<
// #pragma GCC optimize("O3,Ofast,unroll-loops")
// #pragma GCC target("avx2,sse3,sse4,avx")
using namespace std;
//stuff
const ll maxn=1000001;
ll n,q;
ll arr[maxn],val[maxn];
ll f[maxn][22][2];
ll bigger[maxn];
void make_spars(ll x){
    if(x==0){
        for(int i=1;i<=n;i++){
            f[i][x][0]=val[i];
            f[i][x][1]=bigger[i];
        }
    }
    else{
        for(int i=1;i<=n;i++){
            f[i][x][0]=f[i][x-1][0]+f[f[i][x-1][1]][x-1][0];
            f[i][x][1]=f[f[i][x-1][1]][x-1][1];
        }
    }
}
void solve(){
    cin>>n>>q;
    vector<ll>v;
    for(int i=1;i<=n;i++){
        cin>>arr[i]>>val[i];
    }
    for(int i=n;i>=1;i--){
        while(v.size()&&arr[v.back()]<=arr[i]) v.pop_back();
        if(v.size()) bigger[i]=v.back();
        else bigger[i]=0;
        v.push_back(i);
    }
    for(int i=0;i<=21;i++) make_spars(i);
    while(q--){
        ll a,b;
        cin>>a>>b;
        ll idx=21;
        while(idx>=0){
            if(a==0) break;
            if(b-f[a][idx][0]>0&&f[a][idx][0]!=0){
                b-=f[a][idx][0];
                a=f[a][idx][1];
            }
            idx--;
        }
        co a<<'\n';
    }
}
 
int main()
{
    suiii
    int t=1;
    // cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

Subtask #1
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct

Subtask #2
30.0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 78 ms 43080 KB Output is correct
2 Correct 80 ms 41164 KB Output is correct

Subtask #3
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 78 ms 43080 KB Output is correct
9 Correct 80 ms 41164 KB Output is correct
10 Correct 1 ms 6488 KB Output is correct
11 Correct 36 ms 29948 KB Output is correct
12 Correct 146 ms 45840 KB Output is correct
13 Correct 102 ms 45016 KB Output is correct
14 Correct 79 ms 44884 KB Output is correct
15 Correct 65 ms 44880 KB Output is correct