QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#479823 | #602. 最小费用最大流(随机数据) | Kalenist# | 100 ✓ | 664ms | 6024kb | C++14 | 2.4kb | 2024-07-15 21:03:12 | 2024-07-15 21:03:13 |
Judging History
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;
}
Details
Tip: Click on the bar to expand more detailed information
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"