https://www.lydsy.com/JudgeOnline/problem.php?id=3040
题意rt，使用pb_ds的堆解决本问题。
所以其实就是mark一下的。
不过有人确认过官方不能使用“using namespace __gnu_pbds;”
#include<cmath> #include<queue> #include<cstdio> #include<cctype> #include<cstring> #include<iostream> #include<algorithm> #include<ext/pb_ds/priority_queue.hpp> using namespace std; typedef long long ll; typedef pair<ll,int>pii; typedef __gnu_pbds::priority_queue<pii,greater<pii>,__gnu_pbds::pairing_heap_tag> heap; #define fi first #define se second const int N=1e6+5; const int M=1e7+5; const ll INF=1e18; inline int read(){int X=0,w=0;char ch=0;while(!isdigit(ch)){w|=ch=='-';ch=getchar();}while(isdigit(ch))X=(X<<3)+(X<<1)+(ch^48),ch=getchar();return w?-X:X; } struct node{int to,nxt;ll w; }e[M]; int n,m,c,cnt,head[N]; heap q; heap::point_iterator id[N]; inline void add(int u,int v,ll w){e[++cnt].to=v;e[cnt].w=w;e[cnt].nxt=head[u];head[u]=cnt; } ll dis[N]; void dij(int s){for(int i=1;i<=n;i++)dis[i]=INF;dis[s]=0;id[s]=q.push(pii(0,s));while(!q.empty()){int u=q.top().se;q.pop();for(int i=head[u];i;i=e[i].nxt){int v=e[i].to;ll w=e[i].w;if(dis[v]>dis[u]+w){dis[v]=dis[u]+w;if(id[v]!=0)q.modify(id[v],pii(dis[v],v));else id[v]=q.push(pii(dis[v],v));}}}return; } int main(){n=read(),m=read();int t=read(),rxa=read(),rxc=read(),rya=read(),ryc=read(),rp=read();int x=0,y=0;for(int i=1;i<=t;i++){x=((ll)x*rxa+rxc)%rp;y=((ll)y*rya+ryc)%rp;int u=min(x%n+1,y%n+1),v=max(y%n+1,y%n+1);add(u,v,100000000-100*u);}for(int i=t+1;i<=m;i++){int u=read(),v=read(),w=read();add(u,v,w);}dij(1);printf("%lld\n",dis[n]);return 0; }
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