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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#340943#602. 最小费用最大流(随机数据)Jsxts_#100 ✓971ms4540kbC++141.7kb2024-02-29 14:23:062024-02-29 14:23:07

Judging History

你现在查看的是最新测评结果

  • [2024-02-29 14:23:07]
  • 评测
  • 测评结果:100
  • 用时:971ms
  • 内存:4540kb
  • [2024-02-29 14:23:06]
  • 提交

answer

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int inf = 1e9;
const ll INF = 1e15;
const int N = 1e5;
inline int read() {
	int s = 0,f = 1;char ch = getchar();
	while (!isdigit(ch)) f = ch == '-' ? -1 : 1, ch = getchar();
	while (isdigit(ch)) s = (s << 3) + (s << 1) + ch - '0', ch = getchar();
	return s*f;
}
int n,m,head[N + 10],cnt = 1;
struct edge {
	int v,w,f,nxt;
}ed[N * 2 + 10];
void add(int u,int v,int w,int f) {
	ed[++cnt] = {v,w,f,head[u]};
	head[u] = cnt;
}
void add_(int u,int v,int w,int f) {
	add(u,v,w,f), add(v,u,-w,0);
}
int h2[N + 10],S,T,vis[N + 10];
ll dis[N + 10],minans = 0;
bool spfa() {
	for (int i = 1;i <= n;i ++ ) dis[i] = INF, vis[i] = 0;
	dis[S] = 0;
	queue<int> q;
	q.push(S);
	while (!q.empty()) {
		int u = q.front();q.pop();
		vis[u] = 0;
		for (int i = head[u];i;i = ed[i].nxt) {
			int v = ed[i].v;
			if (ed[i].f && dis[v] > dis[u] + ed[i].w) {
				dis[v] = dis[u] + ed[i].w;
				if (!vis[v]) vis[v] = 1, q.push(v);
			}
		}
	}
	return dis[T] != INF;
}
int dfs(int x,int fl) {
	if (x == T) return fl;
	vis[x] = 1;
	int tmp = 0;
	for (int i = head[x];i;i = ed[i].nxt) {
		int v = ed[i].v;
		if (vis[v] || dis[v] != dis[x] + ed[i].w || !ed[i].f) continue;
		int vfl = dfs(v,min(ed[i].f,fl - tmp));
		ed[i ^ 1].f += vfl, ed[i].f -= vfl;
		minans += vfl * ed[i].w;
		tmp += vfl;
		if (tmp == fl) return fl;
	}
	vis[x] = 0;
	return tmp;
}
int main() {
	n = read(), m = read(), S = 1, T = n;
	for (int i = 1;i <= m;i ++ ) {
		int u = read(),v = read(),f = read(),w = read();
		add_(u,v,w,f);
	}
	int ans = 0;
	while (spfa()) {
//		cout << 233;
		memset(vis,0,sizeof vis);
		ans += dfs(S,2147483647);
	}
	cout << ans << ' ' << minans;
	return 0;
}

Details

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Test #1:

score: 10
Accepted
time: 1ms
memory: 3984kb

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: 3884kb

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: 0ms
memory: 3928kb

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: 28ms
memory: 4000kb

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: 122ms
memory: 4172kb

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: 120ms
memory: 4368kb

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: 115ms
memory: 4288kb

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: 813ms
memory: 4312kb

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: 971ms
memory: 4308kb

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: 854ms
memory: 4540kb

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"