oj.uz

답안 #576496

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
576496 2022-06-13T06:46:38 Z Jassar Fountain (eJOI20_fountain) C++14
0 / 100
 1500 ms 3808 KB 
#include <bits/stdc++.h>
#define ll long long

using namespace std;

int main()
{
	ios_base::sync_with_stdio(0), cin.tie(0), cout.tie(0);
	ll n,q;
	cin >> n >> q;
	vector<pair<ll , ll>> v;
	stack<ll> s;
	ll p[n];
	for (ll i=0; n>i; i++)
    {
        p[i] = 0;
    }
    int sum[n],s2[n];
	for (ll i=0; n>i; i++)
    {
        ll a,b;
        cin >> a >> b;
        v.push_back({a , b});
        sum[i] = v[i].second;
    }
    for (ll i=n-1; i>=0; i--)
    {
        while (!s.empty() && v[i].first > v[s.top()].first)
        {
            s.pop();
        }
        if (s.empty())
        {
            p[i] = -1;
        }
        else
        {
            p[i] = s.top();
        }
        s.push(i);
    }
    for (int i=n-1; i>=0; i--)
    {
        if (p[i] != -1)
        {
            sum[i] += sum[p[i]];
        }
    }
    while (q--)
    {
        ll a,b;
        cin >> a >> b;
        a--;
        if (b > sum[a])
        {
            cout << 0 << endl;
        }
        else
        {
            while (b > 0)
            {
                b -= v[a].second;
                if (0 >= b)
                {
                    cout << a + 1 << endl;
                    break;
                }
                a = p[a];
            }
        }
    }
	return 0;
}

Compilation message

fountain.cpp: In function 'int main()':
fountain.cpp:18:16: warning: unused variable 's2' [-Wunused-variable]
   18 |     int sum[n],s2[n];
      |                ^~

Subtask #1
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 2 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1587 ms 3808 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 212 KB Output is correct
2 Incorrect 2 ms 340 KB Output isn't correct
3 Halted 0 ms 0 KB -