oj.uz

Submission #689375

# Submission time Handle Problem Language Result Execution time Memory
689375 2023-01-28T10:38:44 Z Khizri Fountain (eJOI20_fountain) C++17
100 / 100
 369 ms 38052 KB 
#pragma GCC optimize ("O3")
#include <bits/stdc++.h>
using namespace std;
//------------------------------DEFINE------------------------------
//******************************************************************
#define IOS ios_base::sync_with_stdio(false); cin.tie(0),cout.tie(0)
#define ll long long
#define pb push_back
#define F first
#define S second
#define INF 1e18
#define all(v) (v).begin(),(v).end()
#define rall(v) (v).rbegin(),(v).rend()
#define pii pair<int,int>
#define pll pair<ll,ll>
#define OK cout<<"Ok"<<endl;
#define MOD (ll)(1e9+7)
#define endl "\n"
//******************************************************************
//----------------------------FUNCTION------------------------------
//******************************************************************
ll gcd(ll a,ll b){
    if(a>b) swap(a,b);
    if(a==0) return a+b;
    return gcd(b%a,a);
}
ll lcm(ll a,ll b){
    return a/gcd(a,b)*b;
}
bool is_prime(ll n){
    ll k=sqrt(n);

    if(n==2) return true;
    if(n<2||n%2==0||k*k==n) return false;
    for(int i=3;i<=k;i+=2){
        if(n%i==0){
            return false;
        }
    }
    return true;
}
//*****************************************************************
//--------------------------MAIN-CODE------------------------------
const int mxn=2e5+5,up=20;
ll t=1,n,m,p[up][mxn],sum[up][mxn];
void solve(){
    cin>>n>>m;
    vector<pii>vt;
    vt.pb({0,0});
    priority_queue<pii,vector<pii>,greater<pii>>q;
    for(int i=1;i<=n;i++){
        int x,y;
        cin>>x>>y;
        vt.pb({x,y});
    }
    for(int i=1;i<=n;i++){
        while(q.size()&&q.top().F<vt[i].F){
            pii pq=q.top();
            int u=pq.F,idx=pq.S;
            p[0][idx]=i;
            q.pop();
        }
        q.push({vt[i].F,i});
    }
    for(int i=1;i<=n;i++){
        sum[0][i]=vt[i].S;
    }
    for(int i=1;i<up;i++){
        for(int j=1;j<=n;j++){
            p[i][j]=p[i-1][p[i-1][j]];
            int id=p[i-1][j];
            if(id!=0){
                sum[i][j]=sum[i-1][j]+sum[i-1][id];
            }
            else{
                sum[i][j]=INF;
            }
        }
    }
    while(m--){
        int idx,k;
        cin>>idx>>k;
        bool ok=false;
        for(int i=up-1;i>=0;i--){
            if(sum[i][idx]<k){
                k-=sum[i][idx];
                if(k<=0){
                    cout<<idx<<endl;
                    ok=true;
                    break;
                }
                idx=p[i][idx];
            }
        }
        if(!ok){
            cout<<idx<<endl;
        }
    }
}
int main(){
    IOS;
    //cin>>t;
    while(t--){
        solve();
    }
    return 0;
}

Compilation message

fountain.cpp: In function 'void solve()':
fountain.cpp:59:17: warning: unused variable 'u' [-Wunused-variable]
   59 |             int u=pq.F,idx=pq.S;
      |                 ^

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 584 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 852 KB Output is correct
4 Correct 1 ms 852 KB Output is correct
5 Correct 2 ms 980 KB Output is correct
6 Correct 2 ms 980 KB Output is correct
7 Correct 1 ms 852 KB Output is correct

Subtask #2
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 234 ms 32216 KB Output is correct
2 Correct 282 ms 32756 KB Output is correct

Subtask #3
40.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 584 KB Output is correct
2 Correct 1 ms 724 KB Output is correct
3 Correct 1 ms 852 KB Output is correct
4 Correct 1 ms 852 KB Output is correct
5 Correct 2 ms 980 KB Output is correct
6 Correct 2 ms 980 KB Output is correct
7 Correct 1 ms 852 KB Output is correct
8 Correct 234 ms 32216 KB Output is correct
9 Correct 282 ms 32756 KB Output is correct
10 Correct 1 ms 852 KB Output is correct
11 Correct 88 ms 20732 KB Output is correct
12 Correct 369 ms 37996 KB Output is correct
13 Correct 244 ms 37532 KB Output is correct
14 Correct 170 ms 36900 KB Output is correct
15 Correct 149 ms 38052 KB Output is correct