QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#474222 | #602. 最小费用最大流(随机数据) | wangzhifang# | 100 ✓ | 345ms | 6000kb | C++14 | 1.9kb | 2024-07-12 16:45:55 | 2024-07-12 16:45:56 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
constexpr ll inf_ll=numeric_limits<ll>::max();
constexpr int max_n=400;
constexpr int max_m=15000;
constexpr int lim=1000000;
struct note{
int u,v,c,w;
}edgs[max_m+1];
int deg[max_n+1],ed[max_n+1];
struct edge_t{
int v,iv,f,c;
}buf[max_m*2];
int que[lim+1];
ll dist[max_n+1];
int mnf[max_n+1],prv[max_n+1];
bool vis[max_n+1];
bool spfa(const int n,const int s,const int t){
for(int i=1; i<=n; ++i)
dist[i]=inf_ll,vis[i]=0,mnf[i]=0;
que[0]=s,dist[s]=0,vis[s]=1,mnf[s]=numeric_limits<int>::max();
for(int head=0,tail=0; head<=tail; ++head){
const int u=que[head];
const int fu=mnf[u];
const ll du=dist[u];
// fprintf(stderr,"%d: %lld\n",u,du);
vis[u]=0;
for(edge_t*it=buf+deg[u],*const ed=buf+::ed[u]; it!=ed; ++it)
if(it->f){
const ll dv=du+it->c;
if(dv<dist[it->v]){
dist[it->v]=dv,mnf[it->v]=min(fu,it->f),prv[it->v]=it->iv;
if(!vis[it->v])
que[++tail]=it->v,vis[it->v]=1;
}
}
}
return dist[t]<inf_ll;
}
int main(){
int n,m,s,t;
scanf("%d%d",&n,&m);
s=1,t=n;
for(int i=1; i<=m; ++i){
scanf("%d%d%d%d",&edgs[i].u,&edgs[i].v,&edgs[i].c,&edgs[i].w);
++deg[edgs[i].u],++deg[edgs[i].v];
}
for(int i=2; i<=n; ++i)
deg[i]+=deg[i-1];
ed[0]=0;
for(int i=1; i<=n; ++i)
ed[i]=deg[i];
for(int i=m; i; --i){
const int u=edgs[i].u,v=edgs[i].v;
const int edu=--deg[u];
const int edv=--deg[v];
buf[edu].v=v,buf[edu].iv=edv,buf[edu].f=edgs[i].c,buf[edu].c=edgs[i].w;
buf[edv].v=u,buf[edv].iv=edu,buf[edv].f=0,buf[edv].c=-edgs[i].w;
}
ll ans=0,cst=0;
while(spfa(n,s,t)){
const int tmp=mnf[t];
ans+=tmp;
// fprintf(stderr,"* %d %lld\n",tmp,dist[t]);
cst+=dist[t]*tmp;
for(int u=t; u!=s; ){
const int id=prv[u];
buf[id].f+=tmp,buf[buf[id].iv].f-=tmp;
u=buf[id].v;
}
}
printf("%lld %lld\n",ans,cst);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 10
Accepted
time: 1ms
memory: 5912kb
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: 3808kb
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: 5916kb
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: 9ms
memory: 3916kb
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: 37ms
memory: 6000kb
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: 37ms
memory: 5972kb
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: 36ms
memory: 4100kb
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: 301ms
memory: 4464kb
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: 345ms
memory: 4308kb
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: 315ms
memory: 4388kb
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"