#include #include #include #include #include #include #include #include #include #define ll long long
#define inf 0x3f3f3f3f
using namespace std;
const int n = 1e3+10;
struct nodeedge[10000];
int head[n];//前向星
int sk[n][n];//商店需求量
int hk[n][n];//倉庫儲存量
int mk[n][n];//倉庫到商店的費用
int sn[n];//所有商店一共需要第k種物品多少
int hn[n];//所有倉庫一共儲存第k種物品多少
int pre[n];//記錄前驅,記錄的是edge的編號
int n,m,k,top;
int s,e,ans;
void init()
void add(int u,int v,int f,int c);
head[u] = top++;
}int dis[n];
bool vis[n];
bool ek_spfa()}}
}return pre[e]!=-1;
}bool ek_max_flow(int t)
for(int i = pre[e]; ~i; i = pre[edge[i^1].to])
flow_ans += mn;
}if(flow_ans != sn[t])return true;
ans += cost_ans;
return false;
}int main()
}//倉庫
for(int i = 1; i <= m; ++i)
}bool flag = false;
for(int i = 1; i <= k; ++i)
ans = 0;
for(int i = 1; i <= k; ++i)
}if(flag)continue;
init();
for(int j = 1; j <= m; ++j)
for(int j = 1; j <= n; ++j)
for(int j = 1; j <= m; ++j)
}flag = ek_max_flow(i);
}if(flag)
else
}return 0;
}
poj2516 最小費用最大流
include stdio.h 最小費用最大流 poj 2516 include string.h include queue using namespace std define n 115 define inf 1000000000 struct node edge 8 n n int stor...
poj2516(最小費用最大流模版)
首先就這題而言,各k互不影響,可以分開來算,累加即可 對於構圖來說,以後可以源點s 0,匯點t n m,其中一組點是1 n,另一組n 1 n m,注意可以這樣構圖 對於最小費用最大流,要用spfa來做最短路徑,只需記錄路徑即可 include include include include incl...
poj 2516 最小費用流
1 include 2 include 3 include 4 include 5 include 6 include 7 using namespace std 89 define inf 0x3f3f3f3f 1011 int supply 55 demand 55 某種商品的提供量和需求量 1...