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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#93382 | #602. 最小费用最大流(随机数据) | eyiigjkn# | 100 ✓ | 824ms | 4124kb | C++14 | 1.7kb | 2023-03-31 18:31:18 | 2023-03-31 18:31:22 |
Judging History
answer
# include <bits/stdc++.h>
using namespace std;
int dis[410],h[410],cur[410],head[410],nxt[30010],tot=1;
bool vis[410];
struct Edge
{
int v,w,c,f;
Edge(){}
Edge(int v,int w,int c):v(v),w(w),c(c),f(0){}
}edge[30010];
struct Node
{
int v,w;
Node(int v,int w):v(v),w(w){}
bool operator<(const Node &t)const{return w>t.w;}
};
void addedge(int u,int v,int w,int c)
{
nxt[++tot]=head[u];
edge[tot]=Edge(v,w,c);
head[u]=tot;
}
void addE(int u,int v,int w,int c){addedge(u,v,w,c);addedge(v,u,-w,0);}
bool Dijk(int n,int s,int t)
{
static priority_queue<Node> que;
memset(vis+1,0,sizeof(bool)*n);
memset(dis+1,-1,sizeof(int)*n);
que.emplace(s,dis[s]=0);
while(!que.empty())
{
int u=que.top().v;que.pop();
if(vis[u]) continue;
vis[u]=1;
for(int i=head[u];i;i=nxt[i])
{
int v=edge[i].v,w=edge[i].w+h[u]-h[v],c=edge[i].c,f=edge[i].f;
if((dis[v]==-1 || dis[u]+w<dis[v]) && c>f) que.emplace(v,dis[v]=dis[u]+w);
}
}
return ~dis[t];
}
int dfs(int u,int t,int minn)
{
if(u==t || !minn) return minn;
vis[u]=1;
int ans=0;
for(int &i=cur[u];i;i=nxt[i])
{
int v=edge[i].v,w=edge[i].w+h[u]-h[v],c=edge[i].c,f=edge[i].f;
if(vis[v] || dis[u]+w!=dis[v] || c<=f) continue;
int x=dfs(v,t,min(minn,c-f));
edge[i].f+=x;edge[i^1].f-=x;
ans+=x;minn-=x;
if(!minn) break;
}
return ans;
}
int main()
{
int n,m,u,v,w,c,flw=0,cst=0;
cin>>n>>m;
for(int i=0;i<m;i++)
{
scanf("%d%d%d%d",&u,&v,&c,&w);
addE(u,v,w,c);
}
while(Dijk(n,1,n))
{
memset(vis+1,0,sizeof(bool)*n);
memcpy(cur+1,head+1,sizeof(int)*n);
int x=dfs(1,n,INT_MAX);
flw+=x;cst+=x*(dis[n]+h[n]);
for(int i=1;i<=n;i++)
if(~dis[i]) h[i]+=dis[i];
}
cout<<flw<<" "<<cst<<endl;
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 10
Accepted
time: 2ms
memory: 3512kb
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: 3492kb
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: 3504kb
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: 31ms
memory: 3580kb
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: 110ms
memory: 3680kb
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: 113ms
memory: 3660kb
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: 104ms
memory: 3904kb
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: 768ms
memory: 3928kb
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: 824ms
memory: 4124kb
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: 810ms
memory: 3944kb
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"