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Update 1511_xuezhongfenfei.cpp

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Kirigaya Kazuto 2016-05-19 09:55:23 +08:00
parent eea6f821d3
commit e81fc68636
1 changed files with 64 additions and 64 deletions
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128
POJ/1511_xuezhongfenfei.cpp
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@ -3,8 +3,8 @@
using namespace std; using namespace std;
typedef struct fun typedef struct fun
{ {
int a,w,pre; int a,w,pre;
}e; } e;
fun link[2][1000005]; fun link[2][1000005];
bool vis[1000005]; bool vis[1000005];
int point[2][1000005]; int point[2][1000005];
@ -12,73 +12,73 @@ __int64 price[1000005];
int P,Q; int P,Q;
void spfa(int n) void spfa(int n)
{ {
int i; int i;
for(i=2; i<=P; i++) for(i=2; i<=P; i++)
{
vis[i]=false;
price[i]=INT_MAX;
}
vis[1]=true;
price[i]=0;
queue<int>q;
q.push(1);
while(q.empty()==false)
{
int t=q.front();
q.pop();
vis[t]=false;
i=point[n][t];
while(i!=-1)
{
int v=link[n][i].a;
if(price[v]>price[t]+link[n][i].w)
{ {
price[v]=price[t]+link[n][i].w; vis[i]=false;
if(vis[v]==false) price[i]=INT_MAX;
{ }
vis[v]=true; vis[1]=true;
q.push(v); price[i]=0;
} queue<int>q;
q.push(1);
while(q.empty()==false)
{
int t=q.front();
q.pop();
vis[t]=false;
i=point[n][t];
while(i!=-1)
{
int v=link[n][i].a;
if(price[v]>price[t]+link[n][i].w)
{
price[v]=price[t]+link[n][i].w;
if(vis[v]==false)
{
vis[v]=true;
q.push(v);
}
}
i=link[n][i].pre;
}
} }
i=link[n][i].pre;
}
}
} }
int main() int main()
{ {
int T,i,a,b,c; int T,i,a,b,c;
scanf("%d",&T); scanf("%d",&T);
while(T--) while(T--)
{ {
scanf("%d%d",&P,&Q); scanf("%d%d",&P,&Q);
for(i=1; i<=P; i++) for(i=1; i<=P; i++)
point[0][i]=point[1][i]=-1;//这个是用来弄初值的 point[0][i]=point[1][i]=-1;//这个是用来弄初值的
i=0; i=0;
for(i=1; i<=Q; i++) for(i=1; i<=Q; i++)
{ {
scanf("%d%d%d",&a,&b,&c); scanf("%d%d%d",&a,&b,&c);
link[0][i].a=a; link[0][i].a=a;
link[0][i].w=c; link[0][i].w=c;
link[1][i].a=b; link[1][i].a=b;
link[1][i].w=c; link[1][i].w=c;
link[1][i].pre=point[1][a];//记录的是以a开头的 link[1][i].pre=point[1][a];//记录的是以a开头的
point[1][a]=i; point[1][a]=i;
link[0][i].pre=point[0][b]; link[0][i].pre=point[0][b];
point[0][b]=i; point[0][b]=i;
} }
__int64 sum=0; __int64 sum=0;
spfa(1);//是用来出发点不同的啊 spfa(1);//是用来出发点不同的啊
for(i=1; i<=P; i++) for(i=1; i<=P; i++)
{ {
sum+=price[i]; sum+=price[i];
} }
spfa(0); spfa(0);
for(i=1; i<=P; i++) for(i=1; i<=P; i++)
{ {
sum+=price[i]; sum+=price[i];
} }
printf("%I64d\n",sum); printf("%I64d\n",sum);
} }
return 0; return 0;
} }