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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
#46038#602. 最小费用最大流(随机数据)leukocyte#30 421ms4336kbC++171.6kb2022-08-24 22:10:372022-08-24 22:10:39

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2022-08-24 22:10:39]
  • 评测
  • 测评结果:30
  • 用时:421ms
  • 内存:4336kb
  • [2022-08-24 22:10:37]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
using ll=long long;
const int N=4e2,M=1.5e4;
int n,m;
struct MCMF{
	int n,S,T;
	int h[N+5],ek;
	struct E{
		int v,w,c,nxt;
		E(int v=0,int w=0,int c=0,int nxt=0):v(v),w(w),c(c),nxt(nxt){}
	}e[M*2+5];
	int pre[N+5];
	ll fl[N+5],dis[N+5],hv[N+5];
	struct Que{
		int u,d;
		Que(int u=0,int d=0):u(u),d(d){}
		bool operator < (const Que t) const{ return d>t.d; }
	};
	void prep(int _n,int s,int t){
		ek=1; n=_n; S=s; T=t;
	}
	void adde(int u,int v,int w,int c){
		e[++ek]=E(v,w,c,h[u]); h[u]=ek;
		e[++ek]=E(u,0,-c,h[v]); h[v]=ek;
	}
	bool dij(){
		priority_queue<Que> q;
		for(int i=1;i<=n;i++){
			dis[i]=1ll<<60; fl[i]=0;
		}
		dis[S]=0; fl[S]=1ll<<60;
		q.emplace(S,0);
		while(!q.empty()){
			Que t=q.top(); q.pop();
			int u=t.u;
			if(u==T) return fl[T]>0;
			if(dis[u]!=t.d) continue;
			ll d=t.d+hv[u];
			for(int i=h[u];i;i=e[i].nxt){
				int v=e[i].v;
				if(e[i].w&&dis[v]>d+e[i].c-hv[v]){
					dis[v]=d+e[i].c-hv[v];
					fl[v]=min(fl[u],(ll)e[i].w);
					pre[v]=i;
					q.emplace(v,dis[v]);
				}
			}
		}
		return 0;
	}
	pair<ll,ll> mcmf(){
		pair<ll,ll> ans=make_pair(0,0);
		while(dij()){
			ans.first+=fl[T];
			ans.second+=dis[T]+hv[T];
			int now=T;
			while(now!=S){
				int ei=pre[now];
				e[ei].w-=fl[T]; e[ei^1].w+=fl[T];
				now=e[ei^1].v;
			}
			for(int i=1;i<=n;i++) hv[i]+=dis[i];
		}
		return ans;
	}
}f;
int main(){
	scanf("%d %d",&n,&m);
	f.prep(n,1,n);
	for(int i=1,u,v,w,c;i<=m;i++){
		scanf("%d %d %d %d",&u,&v,&w,&c);
		f.adde(u,v,w,c);
	}
	pair<ll,ll> ans=f.mcmf();
	printf("%lld %lld\n",ans.first,ans.second);
	return 0;
}

详细

Test #1:

score: 10
Accepted
time: 2ms
memory: 4304kb

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: 0
Wrong Answer
time: 2ms
memory: 4336kb

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:

13 285

result:

wrong answer 1st numbers differ - expected: '15', found: '13'

Test #3:

score: 0
Time Limit Exceeded

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:


result:


Test #4:

score: 10
Accepted
time: 21ms
memory: 4312kb

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: 78ms
memory: 4244kb

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: 0
Time Limit Exceeded

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:


result:


Test #7:

score: 0
Wrong Answer
time: 71ms
memory: 4328kb

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:

1971 140527

result:

wrong answer 1st numbers differ - expected: '2000', found: '1971'

Test #8:

score: 0
Wrong Answer
time: 421ms
memory: 4192kb

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:

3723 454994

result:

wrong answer 1st numbers differ - expected: '5000', found: '3723'

Test #9:

score: 0
Time Limit Exceeded

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:


result:


Test #10:

score: 0
Time Limit Exceeded

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:


result: