标签:class flow name i++ back ace ack emc efi
#include<bits/stdc++.h>
using namespace std;
const int maxn = 1e6+11;
const int oo = 0x7fffffff;
const double eps = 1e-8;
int to[maxn<<1],nxt[maxn<<1],cap[maxn<<1],flow[maxn<<1];
int head[maxn],tot;
void init(){
memset(head,-1,sizeof head);
tot=0;
}
void add(int u,int v,int w){
to[tot]=v;
nxt[tot]=head[u];
cap[tot]=w;
flow[tot]=0;
head[u]=tot++;
swap(u,v);
to[tot]=v;
nxt[tot]=head[u];
cap[tot]=0;
flow[tot]=0;
head[u]=tot++;
}
int n,m,s,t;
int dis[maxn],pre[maxn],cur[maxn],gap[maxn];
bool vis[maxn];
struct QUEUE{
int que[maxn];
int front,rear;
void init(){front=rear=0;}
void push(int u){que[rear++]=u;}
int pop(){return que[front++];}
bool empty(){return front==rear;}
}que;
void bfs(){
memset(vis,0,sizeof vis);
que.init();
que.push(t);
vis[t]=1;dis[t]=0;
while(que.empty()^1){
int u = que.pop();
for(int i = head[u]; ~i; i = nxt[i]){
register int v=to[i],c=cap[i^1],f=flow[i^1];
if(!vis[v]&&c>f){
vis[v]=1;
dis[v]=dis[u]+1;
que.push(v);
}
}
}
}
int aug(){
int u=t,ans=oo;
while(u!=s){
ans=min(ans,cap[pre[u]]-flow[pre[u]]);
u=to[pre[u]^1];
}
u=t;
while(u!=s){
flow[pre[u]]+=ans;
flow[pre[u]^1]-=ans;
u=to[pre[u]^1];
}
return ans;
}
int isap(){
int ans=0;
bfs();
memset(gap,0,sizeof gap);
memcpy(cur,head,sizeof head);
for(int i = 1; i <= n; i++) gap[dis[i]]++;
int u = s;
while(dis[s]<n){
if(u==t){
ans+=aug();
u=s;
}
bool ok=0;
for(int i = cur[u]; ~i; i = nxt[i]){
int v=to[i],c=cap[i],f=flow[i];
if(c>f&&dis[u]==dis[v]+1){
ok=1;
pre[v]=i;
cur[u]=i;
u=v;
break;
}
}
if(!ok){
int mn=n-1;
for(int i = head[u]; ~i; i = nxt[i]){
int v=to[i],c=cap[i],f=flow[i];
if(c>f) mn=min(mn,dis[v]);
}
if(--gap[dis[u]]==0) break;
dis[u]=mn+1;gap[dis[u]]++;cur[u]=head[u];
if(u!=s) u=to[pre[u]^1];
}
}
return ans;
}
#define rep(i,j,k) for(int i = j; i <= k; i++)
#define repp(i,j,k) for(int i = j; i < k; i++)
#define repe(i,u) for(int i = head[u]; ~i; i = nxt[i])
#define scan(a) scanf("%d",&a)
#define scann(a,b) scanf("%d%d",&a,&b)
#define scannn(a,b,c) scanf("%d%d%d",&a,&b,&c)
#define println(a) printf("%d\n",a)
#define printbk(a) printf("%d ",a)
#define print(a) printf("%d",a)
double ddis(double a,double b,double c,double d){
// cout<<(a-c)*(a-c)+(b-d)*(b-d)<<endl;
return (a-c)*(a-c)+(b-d)*(b-d);
}
#define bk(a,b) memcpy(a,b,sizeof b)
int _to[maxn<<1],_nxt[maxn<<1],_cap[maxn<<1],_flow[maxn<<1];
int _head[maxn<<1],_tot;
void backup(){
bk(_to,to);
bk(_nxt,nxt);
bk(_cap,cap);
bk(_flow,flow);
bk(_head,head);
_tot=tot;
}
void rec(){
bk(to,_to);
bk(nxt,_nxt);
bk(cap,_cap);
bk(flow,_flow);
bk(head,_head);
tot=_tot;
}
int main(){
int n1,ni[maxn],mi[maxn],sum;
double D,xi[maxn],yi[maxn];
int T; scan(T);
while(T--){
scan(n1);
scanf("%lf",&D);
init();sum=0;
rep(i,1,n1){
scanf("%lf%lf%d%d",&xi[i],&yi[i],&ni[i],&mi[i]);
sum+=ni[i];
}
s=4*n1+1;t=s+1;n=t;
#define rg(x) ((x)+n1)
#define chai(x) ((x)+2*n1)
#define rgchai(x) ((x)+3*n1)
rep(i,1,n1) add(s,i,ni[i]);
rep(i,1,n1){
add(i,rg(i),oo);
add(i,chai(i),mi[i]);
add(rg(i),rgchai(i),mi[i]);
add(rg(i),i,oo);
rep(j,1,n1){
if(i==j) {continue;}
bool flag=0;
if(fabs(D*D-ddis(xi[i],yi[i],xi[j],yi[j]))>=0) flag=1;
if(flag){
add(chai(i),rg(j),oo);
add(rgchai(j),i,oo);
}
}
}
backup();
// memcpy(_head,head,sizeof head);
vector<int> vec;
rep(i,1,n1){
rec();
// if(i>1) tot-=2;
// memcpy(head,_head,sizeof head);
add(rg(i),t,oo);
// if(isap()==sum) vec.push_back(i);
println(isap());
}
// if(vec.size()) for(int i = 0; i < vec.size(); i++){
// if(i==vec.size()-1) println(vec[i]);
// else printbk(vec[i]);
// }
// else println(-1);
}
return 0;
}
标签:class flow name i++ back ace ack emc efi
原文地址:http://www.cnblogs.com/caturra/p/7911823.html