oj.uz

답안 #84264

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
84264 2018-11-14T04:07:01 Z shoemakerjo 여행하는 상인 (APIO17_merchant) C++14
33 / 100
 172 ms 4384 KB 
#include <bits/stdc++.h>

using namespace std;
#define ll long long
#define pll pair<ll, ll>
#define maxn 101
#define maxk 1010
int N, M, K;
const ll inf = 1LL << 60;

ll dist[maxn][maxn];
ll buy[maxn][maxk];
ll sell[maxn][maxk];
ll profit[maxn][maxn];
ll d2[maxn][maxn];

bool check(ll val) {
	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= N; j++) {
			d2[i][j] = profit[i][j] - val*min(inf/val, dist[i][j]);
		}
		d2[i][i] = -1;
	}
	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= N; j++) {
			for (int k = 1; k <= N; k++) {
				d2[i][j] = max(d2[i][j], d2[i][k] + d2[k][j]);
			}
		}
	}

	for (int i = 1; i <= N; i++) {
		if (d2[i][i] >= 0) return true;
	}
	return false;
}

int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin >> N >> M >> K;
	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= N; j++) {
			dist[i][j] = inf;
		}
		dist[i][i] = inf;
	}
	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= K; j++) {
			cin >> buy[i][j] >> sell[i][j];
		}
	}
	int vp, wp; ll tp;
	for (int i = 0; i < M; i++) {
		cin >> vp >> wp >> tp;
		dist[vp][wp] = min(dist[vp][wp], tp);
	}

	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= N; j++) {
			for (int k = 1; k <= N; k++) {
				dist[i][j] = min(dist[i][j], dist[i][k] + dist[k][j]);
			}
		}
	}
	for (int i = 1; i <= N; i++) {
		for (int j = 1; j <= N; j++) {
			if (i == j) continue;
			for (int k = 1; k <= K; k++) {
				if (buy[i][k] == -1 || sell[j][k] == -1) continue;
				profit[i][j] = max(profit[i][j], sell[j][k] - buy[i][k]);
			}
		}
	}

	ll lo = 0LL;
	ll hi = inf;
	while (lo < hi) {
		ll mid = (lo+hi+1)/2LL;
		if (check(mid)) {
			lo = mid;
		}
		else hi = mid-1;
	}
	cout << lo << endl;

}

Subtask #1
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 172 ms 2240 KB Output is correct
2 Correct 79 ms 2240 KB Output is correct
3 Correct 79 ms 2240 KB Output is correct
4 Incorrect 13 ms 2240 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #2
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 15 ms 2240 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
33.0 / 33.0

# 결과 실행 시간 메모리 Grader output
1 Correct 107 ms 2240 KB Output is correct
2 Correct 133 ms 4332 KB Output is correct
3 Correct 92 ms 4332 KB Output is correct
4 Correct 90 ms 4332 KB Output is correct
5 Correct 87 ms 4384 KB Output is correct
6 Correct 88 ms 4384 KB Output is correct
7 Correct 15 ms 4384 KB Output is correct
8 Correct 3 ms 4384 KB Output is correct
9 Correct 16 ms 4384 KB Output is correct
10 Correct 16 ms 4384 KB Output is correct
11 Correct 15 ms 4384 KB Output is correct
12 Correct 17 ms 4384 KB Output is correct
13 Correct 15 ms 4384 KB Output is correct

Subtask #4
0 / 34.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 15 ms 2240 KB Output isn't correct
2 Halted 0 ms 0 KB -