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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#342367#602. 最小费用最大流(随机数据)shuopihua#100 ✓942ms4460kbC++141.5kb2024-03-01 10:56:302024-03-01 10:57:01

Judging History

你现在查看的是最新测评结果

  • [2024-03-01 10:57:01]
  • 评测
  • 测评结果:100
  • 用时:942ms
  • 内存:4460kb
  • [2024-03-01 10:56:30]
  • 提交

answer

#include <cstdio>
#include <cstring>
#include <algorithm>
#include <queue>
#define int long long
using namespace std;

int n,m,cnt=1,cost;
int h[405];
int cur[405];
int dis[405];
bool mp[405];
bool vis[405];
struct node{int v,nxt,c,w;}edge[30005];

inline void addedge(int u,int v,int c,int w){
	edge[++cnt]={v,h[u],c,w};
	h[u]=cnt;
	edge[++cnt]={u,h[v],0,-w};
	h[v]=cnt;
	return ;
}

inline bool bfs(int S,int T){
	for(int i=1;i<=n;i++) dis[i]=1e18,vis[i]=0;
	dis[S]=0;
	queue <int> q;
	q.push(S);
	vis[S]=1;
	while(!q.empty()){
		int u=q.front();
		q.pop();
		vis[u]=0;
		for(int i=h[u];i;i=edge[i].nxt){
			int v=edge[i].v;
			if(edge[i].c&&dis[v]>dis[u]+edge[i].w){
				dis[v]=dis[u]+edge[i].w;
				if(!vis[v]) vis[v]=1,q.push(v);
			}
		}
	}
	return (dis[T]!=1e18);
}

inline int dfs(int u,int T,int flow){
	if(u==T||!flow) return flow;
	int res=0;
	mp[u]=1;
	for(int i=cur[u];i;i=edge[i].nxt){
		cur[u]=i;
		int v=edge[i].v;
		if(mp[v]||!edge[i].c||dis[v]!=dis[u]+edge[i].w) continue;
		int d=dfs(v,T,min(flow,edge[i].c));
		res+=d;
		edge[i].c-=d;
		edge[i^1].c+=d;
		flow-=d;
		cost+=d*edge[i].w;
	}
	mp[u]=0;
	return res;
}

inline int Dinic(int S,int T){
	int f=0;
	while(bfs(S,T)){
		for(int i=1;i<=n;i++) cur[i]=h[i];
		f+=dfs(S,T,1e18);
	}
	return f;
}

signed main(){
	scanf("%lld%lld",&n,&m);
	for(int i=1;i<=m;i++){
		int u,v,c,w;
		scanf("%lld%lld%lld%lld",&u,&v,&c,&w);
		addedge(u,v,c,w);
	}
	int flow=Dinic(1,n);
	printf("%lld %lld\n",flow,cost);

	return 0;
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 10
Accepted
time: 1ms
memory: 4072kb

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: 1ms
memory: 3792kb

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: 3744kb

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: 26ms
memory: 3912kb

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: 109ms
memory: 4056kb

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: 109ms
memory: 4116kb

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: 108ms
memory: 3996kb

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: 795ms
memory: 4412kb

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: 942ms
memory: 4416kb

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: 859ms
memory: 4460kb

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"