OJ-Problems-Source/HDOJ/4360_autoAC.cpp

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#include <iostream>
#include <cstdio>
#include <cstring>
#include <algorithm>
using namespace std;
typedef long long lld;
const int mn=3333;
const int mm=33333;
const lld oo=1e15;
int reach[mm], ne[mm], flow[mm], ch[mm];
lld head[mn], que[mn], dis[mn][4], cnt[mn][4], inque[mn];
int n, edge;
void addedge(int u, int v, int c1, int c2, char c)
{
ch[edge]=c, reach[edge]=v, flow[edge]=c1, ne[edge]=head[u], head[u]=edge++;
ch[edge]=c, reach[edge]=u, flow[edge]=c2, ne[edge]=head[v], head[v]=edge++;
}
int find(char c)
{
if(c=='L') return 0;
else if(c=='O') return 1;
else if(c=='V') return 2;
else return 3;
}
bool spfa()
{
int l=0, h=0;
memset(inque,0,sizeof(inque));
for(int i=1; i<=n; i++)
for(int j=0; j<4; j++) dis[i][j]=oo, cnt[i][j]=0;
inque[1]=1;
dis[1][0]=0;
que[l++]=1;
while(l!=h)
{
int u=que[h++];
if(h==mn) h=0;
inque[u]=0;
for(int i=head[u]; i>=0; i=ne[i])
{
int s=find(ch[i]), v=reach[i], val=flow[i];
if(dis[v][(s+1)%4]>=dis[u][s]+val)
{
if(dis[v][(s+1)%4]==dis[u][s]+val)
{
if(cnt[u][s]+1>cnt[v][(s+1)%4]) cnt[v][(s+1)%4]=cnt[u][s]+1;
else continue;
}
else
{
dis[v][(s+1)%4]=dis[u][s]+val;
cnt[v][(s+1)%4]=cnt[u][s]+1;
}
if(!inque[v])
{
inque[v]=1;
que[l++]=v;
if(l==mn) l=0;
}
}
}
}
if(dis[n][0]==oo||!cnt[n][0]) return false;
else return true;
}
int main()
{
int m, T, tcase=0;
cin >> T;
while(T--)
{
cin >> n >> m;
edge=0;
memset(head,-1,sizeof(head));
int mp[4]={0,0,0,0}, ct=0;
while(m--)
{
int u, v, val, se;
char sh[3];
scanf("%d%d%d%s",&u,&v,&val,sh);
addedge(u,v,val,val,sh[0]);
if(n==1&&u==1&&v==1)
{
se=find(sh[0]);
if(!mp[se]) ct++, mp[se]=val;
else mp[se]=min(mp[se],val);
}
}
if(ct==4)
{
lld sum=mp[0]+mp[1]+mp[2]+mp[3];
printf("Case %d: Cute Sangsang, Binbin will come with a donkey after travelling %I64d meters and finding %d LOVE strings at last.\n",++tcase,sum,ct/4);
continue;
}
bool ok=spfa();
if(!ok) printf("Case %d: Binbin you disappoint Sangsang again, damn it!\n",++tcase);
else printf("Case %d: Cute Sangsang, Binbin will come with a donkey after travelling %I64d meters and finding %d LOVE strings at last.\n",++tcase,dis[n][0],cnt[n][0]/4);
}
return 0;
}