标签:des style color java os io strong for
4 4 2 1 1 0 1 2 0 0 1 3 0 0 2 4 1 -1 3 4 3 -1 4 4 2 1 1 0 1 2 0 0 1 3 3 1 2 4 1 -1 3 4 3 -1
4 0 4 3
#include <iostream>
#include <cstdio>
#include <cstring>
#include <vector>
#include <string>
#include <algorithm>
#include <queue>
using namespace std;
const int maxn = 100+10;
const int maxm = 1000+10;
const int inf = 1<<25;
int n,m,nume;
struct edge{
int v,f,nxt;
};
struct build{
int u,v,w;
build(int u,int v,int w):u(u),v(v),w(w){}
};
vector<build> vb[3];
edge e[maxm];
int head[maxn];
int city[maxn];
void addedge(int u,int v,int c){
e[++nume].nxt = head[u];
e[nume].v = v;
e[nume].f = c;
head[u] = nume;
e[++nume].nxt = head[v];
e[nume].v = u;
e[nume].f = 0;
head[v] = nume;
}
void init(){
memset(head,0,sizeof head);
nume = 1;
}
queue<int> que;
bool vis[maxn];
int dist[maxn];
int src,sink;
void bfs(){
memset(dist,0,sizeof dist);
while(!que.empty()) que.pop();
vis[src] = true;
que.push(src);
while(!que.empty()){
int u = que.front();
que.pop();
for(int i = head[u]; i ; i = e[i].nxt){
if(e[i].f && !vis[e[i].v]){
que.push(e[i].v);
vis[e[i].v] = 1;
dist[e[i].v] = dist[u]+1;
}
}
}
}
int dfs(int u,int delta){
if(u== sink) return delta;
else{
int ret = 0;
for(int i = head[u]; delta&&i; i = e[i].nxt){
if(e[i].f && dist[e[i].v] == dist[u]+1){
int dd = dfs(e[i].v,min(e[i].f,delta));
e[i].f -= dd;
e[i^1].f += dd;
delta -= dd;
ret += dd;
}
}
return ret;
}
}
int maxflow(){
int ret = 0;
while(true){
memset(vis,0,sizeof vis);
bfs();
if(!vis[sink]) return ret;
ret += dfs(src,inf);
}
}
int main(){
while(~scanf("%d%d",&n,&m)){
src = 0;
sink = n+1;
for(int i = 0; i < 3; i++) vb[i].clear();
for(int i = 1; i <= n; i++) scanf("%d",&city[i]);
bool flag = 0;
while(m--){
int a,b,c,d;
scanf("%d%d%d%d",&a,&b,&c,&d);
if(d==0){
vb[1].push_back(build(a,b,c));//现代桥
}
else if(d<0){
vb[0].push_back(build(a,b,c));//隧道
flag = 1;
}else{
vb[2].push_back(build(a,b,c));//古代桥
}
}
if(!flag){
printf("Poor Heaven Empire\n");
continue;
}
int d = vb[2].size();
int maxf = -1,minc = inf;
for(int i = 0; i < (1<<d); i++){
init();
int tc = 0;
for(int j = 0; j < d; j++){
if(i&(1<<j)){
addedge(vb[2][j].u,vb[2][j].v,inf);
tc += vb[2][j].w;
}else{
addedge(vb[2][j].u,vb[2][j].v,1);
}
}
for(int i = 1; i <= n; i++){
addedge(0,i,city[i]);
}
for(int i = 0; i < vb[1].size(); i++){
addedge(vb[1][i].u,vb[1][i].v,inf);
}
for(int i = 0; i < vb[0].size(); i++){
addedge(vb[0][i].u,vb[0][i].v,inf);
addedge(vb[0][i].u,n+1,vb[0][i].w);
}
int tm = maxflow();
if(tm > maxf){
maxf = tm;
minc = tc;
}
if(tm==maxf && minc > tc){
minc = tc;
}
}
if(maxf==-1){
printf("Poor Heaven Empire\n");
}else{
printf("%d %d\n",maxf,minc);
}
}
return 0;
}
HDU4309-Seikimatsu Occult Tonneru(最大流),布布扣,bubuko.com
HDU4309-Seikimatsu Occult Tonneru(最大流)
标签:des style color java os io strong for
原文地址:http://blog.csdn.net/mowayao/article/details/38384917