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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#474264 | #602. 最小费用最大流(随机数据) | templatetemplate# | 100 ✓ | 686ms | 5228kb | C++17 | 2.9kb | 2024-07-12 16:59:09 | 2024-07-12 16:59:12 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
template<typename T>inline void read(T &x){
x=0;
bool flag=0;
char ch=getchar();
while(ch<'0'||ch>'9') flag=flag||(ch=='-'),ch=getchar();
while(ch>='0'&&ch<='9') x=x*10+ch-'0',ch=getchar();
x=flag?-x:x;
}
template<typename T,typename ...Args>inline void read(T &x,Args &...args){
read(x),read(args...);
}
template<typename T>inline void prt(T x){
if(x>9) prt(x/10);
putchar(x%10+'0');
}
template<typename T>inline void put(T x){
if(x<0) putchar('-'),x=-x;
prt(x);
}
template<typename T>inline void put(char ch,T x){
put(x),putchar(ch);
}
template<typename T,typename ...Args>inline void put(char ch,T x,Args ...args){
put(ch,x),put(ch,args...);
}
#define ll long long
#define N 405
#define M 30005
const int inf=2147483647;
int n,m;
struct Flow{
struct edge{
int v,nxt,flow;
ll cost;
}e[M<<1];
int head[N],cnt,s,t;
ll maxflow,mincost;
struct node{
int x;ll v;
node(int _x=0,ll _v=0):x(_x),v(_v){}
inline bool operator<(const node &b)const{
return v>b.v;
}
};
Flow(){
memset(e,0,sizeof(e));
memset(head,0,sizeof(head));
cnt=1,s=t=0;
}
inline void adde(int u,int v,int flow,ll cost){
e[++cnt]=(edge){v,head[u],flow,cost},head[u]=cnt;
}
inline void add(int u,int v,int flow,ll cost){
adde(u,v,flow,cost),adde(v,u,0,-cost);
}
bool vis[N];
ll dis[N];
__int128 h[N];
int now[N];
inline void spfa(){
memset(h,0x3f,sizeof(h));
memset(vis,0,sizeof(vis));
queue<int> q;
q.push(s),vis[s]=1,h[s]=0;
while(!q.empty()){
int x=q.front();q.pop(),vis[x]=0;
for(int i=head[x];i;i=e[i].nxt){
int v=e[i].v;
if(h[v]>h[x]+e[i].cost&&e[i].flow){
h[v]=h[x]+e[i].cost;
if(!vis[v]) q.push(v),vis[v]=1;
}
}
}
}
inline bool dijkstra(){
memset(dis,0x3f,sizeof(dis));
memset(vis,0,sizeof(vis));
priority_queue<node> q;
q.push(node(s,0)),dis[s]=0,now[s]=head[s];
while(!q.empty()){
int x=q.top().x;q.pop();
if(vis[x]) continue;
vis[x]=1;
for(int i=head[x];i;i=e[i].nxt){
int v=e[i].v;__int128 w=e[i].cost-h[v]+h[x];
if(e[i].flow&&dis[v]>dis[x]+w)
now[v]=head[v],dis[v]=dis[x]+w,q.push(node(v,dis[v]));
}
}
return dis[t]<=inf;
}
inline int dfs(int x,int Max){
if(x==t) return Max;
vis[x]=1;
int res=0;
for(int i=now[x];i&&Max;i=e[i].nxt){
int v=e[i].v;now[x]=i;__int128 w=e[i].cost-h[v]+h[x];
if(!vis[v]&&e[i].flow&&dis[v]==dis[x]+w){
int k=dfs(v,min(Max,e[i].flow));
res+=k,Max-=k,e[i^1].flow+=k,e[i].flow-=k;
}
}
vis[x]=0;
return res;
}
inline void mcmf(){
spfa();
while(dijkstra()){
memset(vis,0,sizeof(vis));
int res=dfs(s,inf);
for(int i=1;i<=n;i++) h[i]+=dis[i];
maxflow+=res,mincost+=h[t]*res;
}
}
}F;
int main(){
read(n,m),F.s=1,F.t=n;
for(int i=1,u,v,flow,cost;i<=m;i++)
read(u,v,flow,cost),F.add(u,v,flow,cost);
F.mcmf();
put(' ',F.maxflow,F.mincost);
return 0;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 10
Accepted
time: 0ms
memory: 5152kb
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: 5004kb
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: 4948kb
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: 23ms
memory: 5028kb
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: 80ms
memory: 5228kb
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: 76ms
memory: 4900kb
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: 76ms
memory: 5156kb
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: 612ms
memory: 4980kb
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: 680ms
memory: 5228kb
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: 686ms
memory: 5068kb
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"