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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#129132#602. 最小费用最大流(随机数据)lcjlcj#100 ✓247ms14856kbC++201.8kb2023-07-21 22:35:442023-07-21 22:35:44

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.
  • [2023-07-21 22:35:44]
  • 评测
  • 测评结果:100
  • 用时:247ms
  • 内存:14856kb
  • [2023-07-21 22:35:44]
  • 提交

answer

#include <bits/stdc++.h>

using namespace std;
const int maxn=5e5,inf=1e9; 
int n,m,S,T,cnt=1; 
struct edge {
    int v,f,w,nxt;
    edge() {
        v=f=w=nxt=0; 
    } 
    edge (int a,int b,int c,int d) {
        v=a,f=b,w=c,nxt=d; 
    }
} e[maxn+5]; 
int cur=1,h[maxn+5],cu[maxn+5],vis[maxn+5],nwdis; 
int flow,cost; 

void adde(int u,int v,int f,int w) {
    e[++cnt]=edge(v,f,w,h[u]); h[u]=cnt; 
    e[++cnt]=edge(u,0,-w,h[v]); h[v]=cnt; 
}

int dfs(int u,int lim) {
    if (u==T || lim==0) {
        cost+=lim*nwdis;
        flow+=lim; 
        return lim;  
    }
    vis[u]=1; 
    int ret=0;
    for (int &p=cu[u];p && lim;p=e[p].nxt) {
        int v=e[p].v,f=e[p].f,w=e[p].w; 
        if (!w && f && !vis[v]) {
            int t=dfs(v,min(f,lim)); 
            ret+=t;
            lim-=t;
            e[p].f-=t; 
            e[p^1].f+=t; 
        }
    }
    return ret; 
}

int modlabel() {
    int d=inf; 
    for (int i=1;i<=n;i++) {
        if (vis[i]) {
            for (int p=h[i];p;p=e[p].nxt) {
                int v=e[p].v,f=e[p].f,w=e[p].w;
                if (!vis[v] && f) {
                    d=min(d,w); 
                }
            }
        }
    }
    if (d==inf) return 0; 
    for (int i=1;i<=n;i++) {
        if (vis[i]) {
            for (int p=h[i];p;p=e[p].nxt) {
                e[p].w-=d; 
                e[p^1].w+=d; 
            }
        }
    }
    nwdis+=d; 
    return 1; 
}

void mcmf() {
    do {
        do {
            fill(vis+1,vis+n+1,0);
            copy(h+1,h+n+1,cu+1); 
        } while (dfs(S,1e9)); 
    } while (modlabel());
    cout<<flow<<' '<<cost<<'\n'; 
}
int main() {
    cin>>n>>m; 
S=1,T=n; 
    for (int i=1;i<=m;i++) {
        int u,v,f,w;
        cin>>u>>v>>f>>w;
        adde(u,v,f,w); 
    }
    mcmf(); 
    return 0; 
}

Details

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Test #1:

score: 10
Accepted
time: 3ms
memory: 14856kb

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: 13840kb

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: 13704kb

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: 13ms
memory: 13592kb

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: 34ms
memory: 13672kb

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: 32ms
memory: 13976kb

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: 35ms
memory: 13900kb

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: 227ms
memory: 13260kb

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: 240ms
memory: 14568kb

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: 247ms
memory: 14104kb

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"