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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#480425#602. 最小费用最大流(随机数据)_l_l_#100 ✓935ms4484kbC++142.1kb2024-07-16 15:32:162024-07-16 15:32:16

Judging History

你现在查看的是最新测评结果

  • [2024-07-16 15:32:16]
  • 评测
  • 测评结果:100
  • 用时:935ms
  • 内存:4484kb
  • [2024-07-16 15:32:16]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
const int MAXN = 405;
const int MAXM = 15005;
struct edge {int to, val, co, nxt;} edges[MAXM << 1]; int head[MAXN], tot = 1;
void add(int u, int v, int w, int c) {
	edges[++tot].to = v; edges[tot].nxt = head[u]; edges[tot].co = c; edges[tot].val = w;
	head[u] = tot;
}
long long hei[MAXN], dis[MAXN]; int fe[MAXN], flw[MAXN]; bool vis[MAXN];
void spfa(int s) {
	memset(dis, 0x3f, sizeof dis); queue<int> q; dis[s] = 0; q.push(s); while (q.empty() == 0) {
		int u = q.front(); q.pop(); vis[u] = 0; for (int i = head[u]; i; i = edges[i].nxt) {
			if (edges[i].val && dis[edges[i].to] > dis[u] + edges[i].co) {
				dis[edges[i].to] = dis[u] + edges[i].co;
				if (vis[edges[i].to] == 0) vis[edges[i].to] = 1, q.push(edges[i].to);
			}
		}
	}
}
bool dijk(int s, int t) {
	memset(dis, 0x3f, sizeof dis); memset(vis, 0, sizeof vis);
	priority_queue<pair<int, int>, vector<pair<int, int>>, greater<>> pq;
	pq.push({dis[s] = 0, s}); flw[s] = 0x7fffffff; while (pq.empty() == 0) {
		int u = pq.top().second; pq.pop(); if (vis[u]) continue; vis[u] = 1;
		for (int i = head[u]; i; i = edges[i].nxt) {
			if (edges[i].val && dis[edges[i].to] > dis[u] + edges[i].co + hei[u] - hei[edges[i].to]) {
				dis[edges[i].to] = dis[u] + edges[i].co + hei[u] - hei[edges[i].to];
				flw[edges[i].to] = min(flw[u], edges[i].val); fe[edges[i].to] = i;
				pq.push({dis[edges[i].to], edges[i].to});
			}
		}
	}
	return vis[t];
}
void mcmf(int s, int t, int n) {
	spfa(s); for (int i = 1; i <= n; i++) hei[i] = dis[i];
	long long fl = 0, co = 0;
	while (dijk(s, t)) {
		fl += flw[t]; co += (dis[t] + hei[t]) * flw[t];
		int T = t; while (T != s) {
			edges[fe[T]].val -= flw[t];
			edges[fe[T] ^ 1].val += flw[t];
			T = edges[fe[T] ^ 1].to;
		}
		for (int i = 1; i <= n; i++) hei[i] += dis[i];
	}
	printf("%lld %lld\n", fl, co);
}
int main() {
	int n, m; scanf("%d %d", &n, &m);
	for (int i = 1; i <= m; i++) {
		int u, v, w, c; scanf("%d %d %d %d", &u, &v, &w, &c);
		add(u, v, w, c); add(v, u, 0, -c);
	}
	mcmf(1, n, n);
}

詳細信息

Test #1:

score: 10
Accepted
time: 0ms
memory: 3848kb

input:

8 27
2 3 2147483647 100
1 3 1 100
2 4 2147483647 10
1 4 1 10
2 4 2147483647 10
1 4 1 10
2 8 3 0
3 5 2147483647 100
1 5 1 100
3 8 1 0
3 2 2147483647 0
4 5 2147483647 10
1 5 1 10
4 8 1 0
4 2 2147483647 0
5 6 2147483647 1
1 6 1 1
5 6 2147483647 1
1 6 1 1
5 7 2147483647 1
1 7 1 1
5 8 3 0
5 2 2147483647 ...

output:

8 243

result:

ok 2 number(s): "8 243"

Test #2:

score: 10
Accepted
time: 0ms
memory: 3868kb

input:

12 49
2 10 2147483647 5
1 10 1 5
2 5 2147483647 50
1 5 1 50
2 9 2147483647 8
1 9 1 8
2 8 2147483647 47
1 8 1 47
2 11 2147483647 17
1 11 1 17
2 12 5 0
3 12 0 0
3 2 2147483647 0
4 6 2147483647 18
1 6 1 18
4 11 2147483647 12
1 11 1 12
4 9 2147483647 14
1 9 1 14
4 12 3 0
4 2 2147483647 0
5 11 2147483647...

output:

15 436

result:

ok 2 number(s): "15 436"

Test #3:

score: 10
Accepted
time: 1ms
memory: 3844kb

input:

27 169
2 15 2147483647 24
1 15 1 24
2 19 2147483647 96
1 19 1 96
2 12 2147483647 49
1 12 1 49
2 13 2147483647 75
1 13 1 75
2 24 2147483647 2
1 24 1 2
2 27 5 0
3 27 0 0
3 2 2147483647 0
4 11 2147483647 99
1 11 1 99
4 3 2147483647 85
1 3 1 85
4 27 2 0
4 2 2147483647 0
5 27 0 0
5 2 2147483647 0
6 9 214...

output:

60 4338

result:

ok 2 number(s): "60 4338"

Test #4:

score: 10
Accepted
time: 32ms
memory: 3904kb

input:

77 2149
2 42 2147483647 33
1 42 1 33
2 68 2147483647 30
1 68 1 30
2 76 2147483647 13
1 76 1 13
2 51 2147483647 93
1 51 1 93
2 12 2147483647 39
1 12 1 39
2 57 2147483647 74
1 57 1 74
2 70 2147483647 21
1 70 1 21
2 73 2147483647 24
1 73 1 24
2 52 2147483647 54
1 52 1 54
2 15 2147483647 99
1 15 1 99
2 ...

output:

1000 74606

result:

ok 2 number(s): "1000 74606"

Test #5:

score: 10
Accepted
time: 113ms
memory: 4000kb

input:

102 4199
2 48 2147483647 42
1 48 1 42
2 85 2147483647 50
1 85 1 50
2 22 2147483647 83
1 22 1 83
2 95 2147483647 97
1 95 1 97
2 82 2147483647 34
1 82 1 34
2 25 2147483647 72
1 25 1 72
2 4 2147483647 17
1 4 1 17
2 47 2147483647 10
1 47 1 10
2 71 2147483647 12
1 71 1 12
2 68 2147483647 39
1 68 1 39
2 2...

output:

2000 161420

result:

ok 2 number(s): "2000 161420"

Test #6:

score: 10
Accepted
time: 117ms
memory: 3972kb

input:

102 4199
2 79 2147483647 13
1 79 1 13
2 83 2147483647 73
1 83 1 73
2 75 2147483647 90
1 75 1 90
2 30 2147483647 92
1 30 1 92
2 54 2147483647 25
1 54 1 25
2 66 2147483647 53
1 66 1 53
2 52 2147483647 37
1 52 1 37
2 63 2147483647 46
1 63 1 46
2 11 2147483647 20
1 11 1 20
2 55 2147483647 53
1 55 1 53
2...

output:

2000 143072

result:

ok 2 number(s): "2000 143072"

Test #7:

score: 10
Accepted
time: 116ms
memory: 3964kb

input:

102 4199
2 39 2147483647 45
1 39 1 45
2 51 2147483647 11
1 51 1 11
2 86 2147483647 63
1 86 1 63
2 23 2147483647 46
1 23 1 46
2 48 2147483647 63
1 48 1 63
2 87 2147483647 8
1 87 1 8
2 73 2147483647 63
1 73 1 63
2 5 2147483647 52
1 5 1 52
2 80 2147483647 21
1 80 1 21
2 31 2147483647 44
1 31 1 44
2 101...

output:

2000 146132

result:

ok 2 number(s): "2000 146132"

Test #8:

score: 10
Accepted
time: 912ms
memory: 4148kb

input:

302 10599
2 72 2147483647 169
1 72 1 169
2 260 2147483647 165
1 260 1 165
2 12 2147483647 108
1 12 1 108
2 16 2147483647 26
1 16 1 26
2 28 2147483647 148
1 28 1 148
2 7 2147483647 74
1 7 1 74
2 139 2147483647 199
1 139 1 199
2 231 2147483647 9
1 231 1 9
2 287 2147483647 123
1 287 1 123
2 135 2147483...

output:

5000 1106316

result:

ok 2 number(s): "5000 1106316"

Test #9:

score: 10
Accepted
time: 935ms
memory: 4484kb

input:

302 10599
2 222 2147483647 132
1 222 1 132
2 17 2147483647 7
1 17 1 7
2 177 2147483647 253
1 177 1 253
2 90 2147483647 195
1 90 1 195
2 128 2147483647 289
1 128 1 289
2 42 2147483647 193
1 42 1 193
2 213 2147483647 133
1 213 1 133
2 263 2147483647 293
1 263 1 293
2 50 2147483647 155
1 50 1 155
2 228...

output:

5000 1290871

result:

ok 2 number(s): "5000 1290871"

Test #10:

score: 10
Accepted
time: 922ms
memory: 4448kb

input:

302 10599
2 176 2147483647 289
1 176 1 289
2 190 2147483647 99
1 190 1 99
2 10 2147483647 96
1 10 1 96
2 240 2147483647 165
1 240 1 165
2 273 2147483647 205
1 273 1 205
2 248 2147483647 194
1 248 1 194
2 220 2147483647 122
1 220 1 122
2 194 2147483647 167
1 194 1 167
2 8 2147483647 67
1 8 1 67
2 227...

output:

5000 1395897

result:

ok 2 number(s): "5000 1395897"