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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#44793#602. 最小费用最大流(随机数据)zmwang#100 ✓110ms29252kbC++141.8kb2022-08-21 16:58:252022-08-21 16:58:27

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.
  • [2022-08-21 16:58:27]
  • 评测
  • 测评结果:100
  • 用时:110ms
  • 内存:29252kb
  • [2022-08-21 16:58:25]
  • 提交

answer

#include<bits/stdc++.h>
#define int ll
#define mp make_pair
#define fi first
#define se second
#define pii pair<int,int>
#define qr read()
#define in(x) x=read()
#define nc getchar
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
inline ll read()
{
	char ch=' ';
	ll f=1,x=0;
	for(;!isdigit(ch);ch=nc())if(ch=='-')f*=-1;
	for(;isdigit(ch);ch=nc())x=x*10+ch-'0';
	return f*x;
}
vector<int>e[1000010];
struct edge
{
	int v,w,c;
};
int n,m,s,t,dis[1000010],h[1000010],vis[1000010];
vector<edge>eg;
queue<int>q;
void add(int x,int y,int z,int c)
{
	e[x].push_back(eg.size());
	eg.push_back((edge){y,z,c});
	e[y].push_back(eg.size());
	eg.push_back((edge){x,0,-c});
}
bool spfa()
{
	for(int i=1;i<=n;i++)dis[i]=1e16,vis[i]=0;
	dis[s]=0,vis[s]=1;
	q.push(s);
	while(!q.empty())
	{
		int now=q.front();q.pop();
		vis[now]=0;
		for(auto i:e[now])
		{
			if(eg[i].w&&dis[eg[i].v]>dis[now]+eg[i].c)
			{
				dis[eg[i].v]=dis[now]+eg[i].c;
				if(!vis[eg[i].v])vis[eg[i].v]=1,q.push(eg[i].v);
			}
		}
	}
	return dis[t]<=1e15;
}
int cost=0,vis2[1000010];
int dfs(int x,int s)
{
	if(x==t)return s;
	int ans=0;
	vis2[x]=1;
	for(int &ii=h[x];ii<e[x].size();ii++)
	{
		int i=e[x][ii];
		if(!eg[i].w||dis[eg[i].v]!=dis[x]+eg[i].c||vis2[eg[i].v])continue;
		int now=dfs(eg[i].v,min(s,eg[i].w));
		cost+=now*eg[i].c;
		s-=now,ans+=now;
		eg[i].w-=now,eg[i^1].w+=now;
		if(!s)break;
	}
	vis2[x]=0;
	return ans;
}
int flow()
{
	int ans=0;
	while(spfa())
	{
		memset(h,0,sizeof(int)*(n+1));
		ans+=dfs(s,1e16);
	}
	return ans;
}
signed main()
{
	// freopen(".in","r",stdin);
	// freopen(".out","w",stdout);
	n=qr,m=qr;
	s=1,t=n;
	for(int i=1;i<=m;i++)
	{
		int x=qr,y=qr,z=qr,c=qr;
		add(x,y,z,c);
	}
	int ans=flow();
	cout<<ans<<' '<<cost;
	return 0;
}

Details

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Test #1:

score: 10
Accepted
time: 4ms
memory: 27688kb

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: 2ms
memory: 28804kb

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: 4ms
memory: 28672kb

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: 7ms
memory: 27628kb

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: 16ms
memory: 28672kb

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: 13ms
memory: 28272kb

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: 15ms
memory: 27928kb

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: 87ms
memory: 29208kb

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: 110ms
memory: 29252kb

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: 105ms
memory: 28040kb

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"