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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#789393 | #602. 最小费用最大流(随机数据) | zhulexuan | 10 | 0ms | 3756kb | C++14 | 4.3kb | 2024-11-27 20:09:49 | 2024-11-27 20:09:53 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define inf INT_MAX
#define fr(i,l,r) for (i=(l); i<=(r); i++)
#define rfr(i,l,r) for (i=(l); i>=(r); i--)
template<typename T>inline void read(T &n){
T w=1; n=0; char ch=getchar();
while (!isdigit(ch) && ch!=EOF){ if (ch=='-') w=-1; ch=getchar(); }
while (isdigit(ch) && ch!=EOF){ n=(n<<3)+(n<<1)+(ch&15); ch=getchar(); }
n*=w;
}
template<typename T>inline void write(T x){
if (x==0){ putchar('0'); return ; }
T tmp;
if (x>0) tmp=x;
else tmp=-x;
if (x<0) putchar('-');
char F[105];
long long cnt=0;
while (tmp){
F[++cnt]=tmp%10+48;
tmp/=10;
}
while (cnt) putchar(F[cnt--]);
}
#define Min(x,y) x = min(x,y)
#define Max(x,y) x = max(x,y)
//基础配置=================================================================================
struct Cost_flow{
#define N 405
#define M 15005
struct edge{
ll x,y,w,c;
};
ll n,m,S,T;
ll cnt,head[N]; edge e[M+M];
ll nw[N]; bool vis[N];
ll f[N],h[N];
void init(ll _n){
ll i;
n = _n;
cnt = 1;
fr(i,0,n) head[i] = 0;
}
void Addedge(ll x,ll y,ll w,ll c){
cnt++;
e[cnt].x = head[x];
e[cnt].y = y;
e[cnt].w = w;
e[cnt].c = c;
head[x] = cnt;
}
void addedge(ll x,ll y,ll w,ll c){
Addedge(x,y,w,c);
Addedge(y,x,0,-c);
}
struct node{
ll x,v;
node(ll _x=0,ll _v=0){
x = _x, v = _v;
}
bool operator < (const node o)const{
return v>o.v;
}
};
void spfa(ll x){
ll i, go;
bool vis[N]; memset(vis,false,sizeof(vis));
queue<ll> q;
memset(h,0x3f,sizeof(h)); h[x] = 0; q.push(x), vis[x] = true;
while (!q.empty()){
x = q.front(); q.pop();
vis[x] = false;//printf("h[%lld] = %lld\n",x,h[x]);
for (i=head[x]; i; i=e[i].x){
go = e[i].y;
if (e[i].w>0 && h[x]+e[i].c<h[go]){
h[go] = h[x]+e[i].c;
if (!vis[go]) q.push(go), vis[go] = true;
}
}
}
}
bool dij(ll x){
ll i, go;
priority_queue<node> q;
fr(i,0,n+1) f[i] = inf;
f[x] = 0, q.push(node(x,0));
while (!q.empty()){
node p = q.top(); q.pop();
ll x = p.x, v = p.v;
if (v>f[x]) continue;
// printf("f[%lld] = %lld\n",x,f[x]);
for (i=head[x]; i; i=e[i].x){
go = e[i].y;
ll ev = h[x]+e[i].c - h[go];
if (e[i].w>0 && v+ev<f[go]){
f[go] = v+ev;
q.push(node(go,f[go]));
if (go==T) return true;
}
}
}
return false;
// return f[T]<inf;
}
ll dfs(ll x,ll flow){
if (x==T) return flow;
ll i, go, k, ans = 0;
vis[x] = false;
for (i=nw[x]; i && flow; i=e[i].x){
go = e[i].y; nw[x] = i;
if (e[i].w==0 || !vis[go] || h[x]+e[i].c!=h[go]) continue;
k = dfs( go , min(flow,e[i].w) );
ans += k, flow -= k;
e[i].w -= k, e[i^1].w += k;
}
vis[x] = (ans>0);
return ans;
}
pair<ll,ll> dinic(ll _S,ll _T){
ll i, ans = 0, av = 0;
S = _S, T = _T;
// printf("dinic %lld %lld\n",S,T);
spfa(S);
// printf("h[T] = %lld\n",h[T]);
while (dij(S)){
fr(i,0,n) h[i] += f[i], nw[i] = head[i], vis[i] = true;
// printf("h[T] = %lld\n",h[T]);
ll k = dfs(S,inf);
ans += k, av += h[T]*k;
}
return make_pair(ans,av);
}
};
ll n,m,s,t;
Cost_flow flow;
int main(){
// freopen("a.in","r",stdin);
// freopen(".out","w",stdout);
ll i;
read(n); read(m);
flow.init(n);
fr(i,1,m){
ll x,y,w,c;
read(x); read(y); read(w); read(c);
flow.addedge(x,y,w,c);
}
pair<ll,ll> ans = flow.dinic(1,n);
printf("%lld %lld\n",ans.first,ans.second);
return 0;
}
//g++ a.cpp -o a -Wall -Wl,--stack=512000000 -std=c++11 -O2
Details
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Pretests
Final Tests
Test #1:
score: 10
Accepted
time: 0ms
memory: 3756kb
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: 0
Time Limit Exceeded
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:
result:
Test #3:
score: 0
Time Limit Exceeded
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:
result:
Test #4:
score: 0
Time Limit Exceeded
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:
result:
Test #5:
score: 0
Time Limit Exceeded
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:
result:
Test #6:
score: 0
Time Limit Exceeded
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:
result:
Test #7:
score: 0
Time Limit Exceeded
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:
result:
Test #8:
score: 0
Time Limit Exceeded
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:
result:
Test #9:
score: 0
Time Limit Exceeded
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:
result:
Test #10:
score: 0
Time Limit Exceeded
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...