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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#474264#602. 最小费用最大流(随机数据)templatetemplate#100 ✓686ms5228kbC++172.9kb2024-07-12 16:59:092024-07-12 16:59:12

Judging History

你现在查看的是最新测评结果

  • [2024-07-12 16:59:12]
  • 评测
  • 测评结果:100
  • 用时:686ms
  • 内存:5228kb
  • [2024-07-12 16:59:09]
  • 提交

answer

#include<bits/stdc++.h>
using namespace std;
template<typename T>inline void read(T &x){
	x=0;
	bool flag=0;
	char ch=getchar();
	while(ch<'0'||ch>'9') flag=flag||(ch=='-'),ch=getchar();
	while(ch>='0'&&ch<='9') x=x*10+ch-'0',ch=getchar();
	x=flag?-x:x;
}
template<typename T,typename ...Args>inline void read(T &x,Args &...args){
	read(x),read(args...);
}
template<typename T>inline void prt(T x){
	if(x>9) prt(x/10);
	putchar(x%10+'0');
}
template<typename T>inline void put(T x){
	if(x<0) putchar('-'),x=-x;
	prt(x);
}
template<typename T>inline void put(char ch,T x){
	put(x),putchar(ch);
}
template<typename T,typename ...Args>inline void put(char ch,T x,Args ...args){
	put(ch,x),put(ch,args...);
}
#define ll long long
#define N 405
#define M 30005
const int inf=2147483647;
int n,m;
struct Flow{
	struct edge{
		int v,nxt,flow;
		ll cost;
	}e[M<<1];
	int head[N],cnt,s,t;
	ll maxflow,mincost;
	struct node{
		int x;ll v;
		node(int _x=0,ll _v=0):x(_x),v(_v){}
		inline bool operator<(const node &b)const{
			return v>b.v;
		}
	};
	Flow(){
		memset(e,0,sizeof(e));
		memset(head,0,sizeof(head));
		cnt=1,s=t=0;
	}
	inline void adde(int u,int v,int flow,ll cost){
		e[++cnt]=(edge){v,head[u],flow,cost},head[u]=cnt;
	}
	inline void add(int u,int v,int flow,ll cost){
		adde(u,v,flow,cost),adde(v,u,0,-cost);
	}
	bool vis[N];
	ll dis[N];
	__int128 h[N];
	int now[N];
	inline void spfa(){
		memset(h,0x3f,sizeof(h));
		memset(vis,0,sizeof(vis));
		queue<int> q;
		q.push(s),vis[s]=1,h[s]=0;
		while(!q.empty()){
			int x=q.front();q.pop(),vis[x]=0;
			for(int i=head[x];i;i=e[i].nxt){
				int v=e[i].v;
				if(h[v]>h[x]+e[i].cost&&e[i].flow){
					h[v]=h[x]+e[i].cost;
					if(!vis[v]) q.push(v),vis[v]=1;
				}
			}
		}
	}
	inline bool dijkstra(){
		memset(dis,0x3f,sizeof(dis));
		memset(vis,0,sizeof(vis));
		priority_queue<node> q;
		q.push(node(s,0)),dis[s]=0,now[s]=head[s];
		while(!q.empty()){
			int x=q.top().x;q.pop();
			if(vis[x]) continue;
			vis[x]=1;
			for(int i=head[x];i;i=e[i].nxt){
				int v=e[i].v;__int128 w=e[i].cost-h[v]+h[x];
				if(e[i].flow&&dis[v]>dis[x]+w)
					now[v]=head[v],dis[v]=dis[x]+w,q.push(node(v,dis[v]));
			}
		}
		return dis[t]<=inf;
	}
	inline int dfs(int x,int Max){
		if(x==t) return Max;
		vis[x]=1;
		int res=0;
		for(int i=now[x];i&&Max;i=e[i].nxt){
			int v=e[i].v;now[x]=i;__int128 w=e[i].cost-h[v]+h[x];
			if(!vis[v]&&e[i].flow&&dis[v]==dis[x]+w){
				int k=dfs(v,min(Max,e[i].flow));
				res+=k,Max-=k,e[i^1].flow+=k,e[i].flow-=k;
			}
		}
		vis[x]=0;
		return res;
	}
	inline void mcmf(){
		spfa();
		while(dijkstra()){
			memset(vis,0,sizeof(vis));
			int res=dfs(s,inf);
			for(int i=1;i<=n;i++) h[i]+=dis[i];
			maxflow+=res,mincost+=h[t]*res;
		}
	}
}F;
int main(){
	read(n,m),F.s=1,F.t=n;
	for(int i=1,u,v,flow,cost;i<=m;i++)
		read(u,v,flow,cost),F.add(u,v,flow,cost);
	F.mcmf();
	put(' ',F.maxflow,F.mincost);
	return 0;	
}

Details

Tip: Click on the bar to expand more detailed information

Test #1:

score: 10
Accepted
time: 0ms
memory: 5152kb

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: 5004kb

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: 4948kb

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: 23ms
memory: 5028kb

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: 80ms
memory: 5228kb

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: 76ms
memory: 4900kb

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: 76ms
memory: 5156kb

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: 612ms
memory: 4980kb

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: 680ms
memory: 5228kb

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: 686ms
memory: 5068kb

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"