제출 #1128438

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1128438		Agageldi	Toll (BOI17_toll)	C++20	7 / 100	335 ms	12280 KiB

toll

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

#define ll long long
#define N 400005
#define ff first
#define ss second
#define pb push_back
#define sz(s) (int)s.size()
#define rep(c, a, b) for(c = a; c <= b; c++)

ll n, m, K, p[N], o, par[N];
vector <pair<int,int>> v[N];

int main () {
	ios::sync_with_stdio(0);cin.tie(0);
	cin >> K >> n >> m >> o;
	for(int i = 1; i <= m; i++) {
		int x, y, t;
		cin >> x >> y >> t;
		x++;
		y++;
		v[x].pb({y,t});
		par[x] = y;
	}
	for(int i = 1; i <= n; i++) {
		if(!sz(v[i])) continue;
		p[i] = p[i - 1];
		p[i] += v[i][0].ss;
	}

	for(int i = 1; i <= o; i++) {
		int x, y;
		cin >> x >> y;
		x++;
		y++;
		int l = x;
		while(par[l] != 0) {
			if(l == y) break;
			l = par[l];
		}
		if(l!=y) {
			cout << "-1\n";
			continue;;
		}
		cout << p[y - 1] - p[x - 1] << '\n';
	}
}

• Subtask 1: 7 / 7
• Subtask 2: 0 / 10
• Subtask 3: 0 / 8
• Subtask 4: 0 / 31
• Subtask 5: 0 / 44