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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
#479823#602. 最小费用最大流(随机数据)Kalenist#100 ✓664ms6024kbC++142.4kb2024-07-15 21:03:122024-07-15 21:03:13

Judging History

你现在查看的是最新测评结果

  • [2024-07-15 21:03:13]
  • 评测
  • 测评结果:100
  • 用时:664ms
  • 内存:6024kb
  • [2024-07-15 21:03:12]
  • 提交

answer

#include<bits/stdc++.h>
#define N 5010
#define pii pair<int,int>
#define inf 0x3f3f3f3f
#define For(i,a,b) for(register int i=a;i<=b;i++)
#define Edge(i,x) for(int i=head[x],to=e[i].t;i;i=e[i].nx,to=e[i].t)
#define EDge(i,x) for(int i=lnk[x],to=e[i].t;i;i=e[i].nx,to=e[i].t)
using namespace std;
int n,m,s,t,head[N],lnk[N];
int cost,dist[N],num=1,h[N];
bool exist[N],vis[N],in[N];
queue<int> nq;
priority_queue<pii> q;
struct E{int nx,t,c,co;}e[N*40];
inline void add(int f,int t,int c,int co){e[++num]=(E){head[f],t,c,co};head[f]=num;}
inline void bio_add(int f,int t,int c,int co){add(f,t,c,co),add(t,f,0,-co);}
inline void SPFA(int st,int en)
{
    For(i,0,n+2) h[i]=inf;
    h[st]=0,nq.push(st);
    while(!nq.empty())
    {
        int k=nq.front();
        nq.pop(),exist[k]=false;
        Edge(i,k) if(e[i].c && h[k]+e[i].co < h[to])
        {
            h[to]=h[k]+e[i].co;
            if(!exist[to]) nq.push(to),exist[to]=true;
        }
    }
    return;
}

inline bool dijkstra(int st,int en)
{
    For(i,0,n+2)
    {
        h[i]+=dist[i],vis[i]=false;
        dist[i]=inf,lnk[i]=head[i];
    }dist[st]=0,q.push(pii(0,st));
    while(!q.empty())
    {
        int k=q.top().second;q.pop();
        if(vis[k]) continue;vis[k]=true;
        Edge(i,k) if(e[i].c && dist[k]+e[i].co+h[k]-h[to] < dist[to])
        {
            dist[to]=dist[k]+e[i].co+h[k]-h[to];
            q.push(pii(-dist[to],to));
        }
    }
    return dist[en]<inf;
}

inline int dinic(int x,int t,int rest)
{
    if(x == t || !rest) return rest;
    int res=0;in[x]=true;
    EDge(i,x)
    {
        lnk[x]=i;
        if(!in[to] && e[i].c && dist[to] == dist[x]+e[i].co+h[x]-h[to])
        {
            int get=dinic(to,t,min(e[i].c,rest-res));
            if(!get) continue;
            e[i].c-=get,e[i^1].c+=get;
            res+=get,cost+=get*e[i].co;
            if(res == rest) break;
        }
    }in[x]=false;
    return res;
}

inline int mcmf(int st,int en)
{
    int ans=0;//SPFA(st,en);
    while(dijkstra(st,en))
    {
        int nw=dinic(st,en,inf);
        while(nw) ans+=nw,nw=dinic(st,en,inf);
    }
    return ans;
}

int main()
{
    scanf("%d%d",&n,&m),s=1,t=n;
    For(i,1,m)
    {
        int x,y,c,w;
        scanf("%d%d%d%d",&x,&y,&c,&w);
        bio_add(x,y,c,w);
    }int flow=mcmf(s,t);
    printf("%d %d\n",flow,cost);
    return 0;
}

詳細信息

Test #1:

score: 10
Accepted
time: 0ms
memory: 3800kb

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: 3796kb

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: 3824kb

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: 21ms
memory: 5848kb

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: 76ms
memory: 4188kb

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: 72ms
memory: 3932kb

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: 72ms
memory: 4188kb

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: 596ms
memory: 4436kb

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: 664ms
memory: 4108kb

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: 646ms
memory: 6024kb

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"