Create 3946_cnblogs.cpp

From http://www.cnblogs.com/20143605--pcx/p/5426398.html

ZOJ/3946_cnblogs.cpp

@@ -0,0 +1,107 @@
+# include<iostream>
+# include<cstdio>
+# include<cstring>
+# include<vector>
+# include<queue>
+# include<list>
+# include<set>
+# include<map>
+# include<string>
+# include<cmath>
+# include<cstdlib>
+# include<algorithm>
+using namespace std;
+# define LL long long
+ 
+const int N=1005;
+const int INF=1000000000;
+const LL oo=1000000000000005;
+ 
+struct Edge
+{
+    int to,nxt;
+    LL c,d;
+};
+ 
+int n,m,cnt;
+Edge e[N*200];
+LL d[N*100];
+int head[N*100];
+vector<int>pre[N*100];
+ 
+void add(int u,int v,LL d,LL c)
+{
+    e[cnt].to=v;
+    e[cnt].d=d;
+    e[cnt].c=c;
+    e[cnt].nxt=head[u];
+    head[u]=cnt++;
+}
+ 
+void solve()
+{
+    for(int i=0;i<n;++i)
+        pre[i].clear();
+     
+    fill(d,d+n,oo);
+    d[0]=0;
+    queue<int>q;
+    q.push(0);
+    while(!q.empty())
+    {
+        int u=q.front();
+        q.pop();
+        for(int i=head[u];i!=-1;i=e[i].nxt){
+            int v=e[i].to;
+            if(d[v]>d[u]+e[i].d){
+                d[v]=d[u]+e[i].d;
+                q.push(v);
+            }
+        }
+    }
+     
+    q.push(0);
+    while(!q.empty()){
+        int u=q.front();
+        q.pop();
+        for(int i=head[u];i!=-1;i=e[i].nxt){
+            int v=e[i].to;
+            if(d[v]==d[u]+e[i].d){
+                pre[v].push_back(i);
+                q.push(v);
+            }
+        }
+    }
+     
+    LL ans1=0,ans2=0;
+    for(int i=0;i<n;++i){
+        ans1+=d[i];
+        LL minn=oo;
+        for(int j=0;j<pre[i].size();++j)
+            minn=min(minn,e[pre[i][j]].c);
+        if(minn==oo) continue;
+        ans2+=minn;
+    }
+    printf("%lld %lld\n",ans1,ans2);
+}
+ 
+int main()
+{
+    int T;
+    scanf("%d",&T);
+    while(T--)
+    {
+        scanf("%d%d",&n,&m);
+        cnt=0;
+        memset(head,-1,sizeof(head));
+        int a,b;
+        LL c,d;
+        for(int i=0;i<m;++i){
+            scanf("%d%d%lld%lld",&a,&b,&d,&c);
+            add(a,b,d,c);
+            add(b,a,d,c);
+        }
+        solve();
+    }
+    return 0;
+}