QOJ.ac

QOJ

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
#919327	#602. 最小费用最大流（随机数据）	fanchuanyu	100 ✓	1060ms	12024kb	C++14	1.5kb	2025-02-28 10:12:42	2025-02-28 10:12:42

Judging History

This is the latest submission verdict.

[2025-02-28 10:12:42]
Judged

Verdict: 100
Time: 1060ms
Memory: 12024kb

Show

[2025-02-28 10:12:42]
Submitted

answer

#include <bits/stdc++.h>
using namespace std;
#define int long long
int hd[20005], vis[20005], cst[1000005], cur[20005], to[1000005], dis[20005], val[1000005], nxt[1000005],  tot = 1;

void add(int u, int v, int w, int c) {
	to[++tot] = v;
	nxt[tot] = hd[u];
	hd[u] = tot;
	val[tot] = w;
	cst[tot] = c;
}

void add_edge(int u, int v, int w, int c) {
	add(u, v, w, c);
	add(v, u, 0, -c);
}
int n, m, s, t, fl;

bool bfs(int a, int b) {
	queue<int>q;
	memset(vis, 0, sizeof(vis));
	memcpy(cur, hd, sizeof(cur));
	memset(dis, 0x3f, sizeof(dis));
	q.push(a);
	dis[a] = 0;
	while (q.size()) {
		int u = q.front();
		q.pop();
		for (int i = hd[u]; i; i = nxt[i]) {
			int v = to[i], w = cst[i];
			if (val[i] == 0)
				continue;
			if (dis[v] > dis[u] + w) {
				dis[v] = dis[u] + w;
				q.push(v);
			}
		}
	}
	return dis[b] != dis[0];
}
int c;

int dfs(int u, int fl) {
	if (u == t)
		return fl;
	vis[u] = 1;
	int ans = 0;
	for (int &i = cur[u]; i && (fl - ans); i = nxt[i]) {
		int v = to[i];
		if (val[i] == 0 || vis[v] == 1)
			continue;
		if (dis[v] == dis[u] + cst[i]) {
			int f = dfs(v, min(val[i], fl - ans));
			//vis[v]=1;
			val[i] -= f;
			val[i ^ 1] += f;
			ans += f;
			c += f * cst[i];
		}
	}
	return ans;
}

signed main() {
	cin >> n >> m ;
	s = 1, t = n;
	for (int i = 1; i <= m; i++) {
		int u, v, w, c;
		cin >> u >> v >> w >> c;
		add_edge(u, v, w, c);
	}
	int fl = 0;
	while (bfs(s, t))
		fl += dfs(s, 1e18);
	cout << fl << ' ' << c << '\n';
}

源文件, 语言: C++14

詳細信息

Pretests

Final Tests

Test #1:

score: 10

Accepted

time: 1ms

memory: 9764kb

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: 12008kb

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: 9892kb

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: 31ms

memory: 9940kb

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: 141ms

memory: 9812kb

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: 137ms

memory: 9944kb

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: 130ms

memory: 9784kb

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: 914ms

memory: 9896kb

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: 1060ms

memory: 12024kb

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: 1002ms

memory: 9944kb

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"