Submission #1197897

#	Time	Username	Problem	Language	Result	Execution time	Memory
1197897		mishasim	Fountain (eJOI20_fountain)	C++20	0 / 100	1595 ms	3224 KiB

fountain

#include <bits/stdc++.h>

using namespace std;
#define endl '\n'
long long n,q,val,pos,currd;
long long d[100005],v[100005],nextx[100005];
vector<int> vv;
stack<int> st;

int main() {
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>n>>q;
    for(int i = 1 ; i<=n ; i++){
        cin>>d[i]>>v[i];
    }

    for(int i = n ; i>=1 ; i--){
        while(st.size()>0 && d[st.top()]<d[i]){
            st.pop();
        }
        if(st.size()==0)nextx[i] = 0;
        else nextx[i] = st.top();
        st.push(i);
    }

    for(int i = 1 ; i<=q ; i++){
        cin>>pos>>val;
        int j = pos;
        while(j<=n){
            val-=v[j];
            if(val<=0){cout<<j<<endl;break;}
            if(nextx[j]==0){cout<<0<<endl;break;}
            else {
                if(val-v[nextx[j]]-v[nextx[nextx[j]]]-v[nextx[nextx[nextx[j]]]]>=0){
                    val-=v[nextx[j]]+v[nextx[nextx[j]]]+v[nextx[nextx[nextx[j]]]];
                    j = nextx[ nextx[ nextx[ nextx[j] ] ] ];
                }
                else if(val-v[nextx[j]]-v[nextx[nextx[j]]]>=0){
                    val-=v[nextx[j]]+v[nextx[nextx[j]]];
                    j = nextx[ nextx[ nextx[j] ] ];
                }
                else if(val-v[nextx[j]]>=0){
                    val-=v[nextx[j]];
                    j = nextx[ nextx[j] ];
                }
                else {cout<<nextx[j]<<endl;break;}
            }
        }
    }
    return 0;
}

• Subtask 1: 0 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40