Submission #1020917

#	Time	Username	Problem	Language	Result	Execution time	Memory
1020917		modwwe	Commuter Pass (JOI18_commuter_pass)	C++17	100 / 100	305 ms	26348 KiB

commuter_pass

//https://www.instagram.com/_modwwe/
#pragma GCC optimize("Ofast,unroll-loops")
//#pragma GCC target("avx2,bmi,bmi2")
#include<bits/stdc++.h>
#define int long long
//#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".out","w",stdout)
#define pb push_back
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
void phongbeo();
const int inf=1e18;
const int mod2=1e9+7;
const int  mod1=998244353;
struct icd
{
    int a,b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a,b,c;
};
struct id
{
    int a,b,c,d;
};
struct ie
{
    int a,b,c, d,e,f;

};
int n,m,s1,s2,s4,s3,sf,k,r,mid,s5,s6,mx,s7,s8,s9,mx2,res,dem2=0,dem=0,l,l2,r2;
int  i,s10,s12;
int el=29;
main()
{
#ifndef ONLINE_JUDGE
    // fin(task),fou(task);
#endif
    NHP
    /// cin>>s1;
    //  modwwe
    phongbeo();
}
struct cmp
 {
 bool operator()(ib a,ib b)
  {
      return a.a>b.a ;
  }
 };
 struct cmp2
   {
        bool operator()(ic a,ic b)
        {
            return a.a>b.a;
        }
   };
priority_queue<ib,vector<ib>,cmp>p;
int a[100001][3] ;
 bool b[100001] ;
 bool c[100001][4] ;
 vector<ib> v[100001];
  priority_queue<ic,vector<ic>,cmp2>pp;
void dis(int f,int y)
{
      p.push({0,f});
       for(int i=1;i<=n;i++)
        b[i]=0;
       while(!p.empty())
       {
         ib  x=p.top();
         p.pop();
         if(b[x.b])continue;
   a[x.b][y]=x.a;
          b[x.b]=1;
         for(auto f:v[x.b])
          if(!b[f.b])
          p.push({f.a+x.a,f.b});
       }
}
void phongbeo()
 {
      cin>>n>>m;
       cin>>l>>r;
            cin>>l2>>r2;
             for(int i=1;i<=m;i++)
             cin>>s2>>s3>>s4,v[s2].pb({s4,s3}),v[s3].pb({s4,s2});
              dis(l,0);
              dis(r,1);
              dis(r2,2);
pp.push({0,l2,0});
s4=inf;
 while(!pp.empty())
 {
     ic x=pp.top();
     pp.pop();
   //  cout<<x.a+a[x.b][2]<<" "<<a[x.b][2]<<" "<<x.a<<" "<<x.b,debug
     if(c[x.b][x.c]) continue ;
      s4=min(s4,x.a+a[x.b][2]);
     c[x.b][x.c]=1;
       if(x.c==0){
      for(auto f:v[x.b])
        if(!c[f.b][x.c])
        pp.push({f.a+x.a,f.b,x.c});
         if(!c[x.b][1]&&a[x.b][0]+a[x.b][1]==a[r][0])pp.push({x.a,x.b,1});
        }
         else if(x.c==1)
         {
             for(auto f:v[x.b])
                if(!c[f.b][x.c]&&a[f.b][0]+a[f.b][1]==a[r][0]){
                if(a[x.b][0]+a[f.b][1]+f.a==a[r][0])             pp.push({x.a,f.b,3});
                    if(a[f.b][0]+a[x.b][1]+f.a==a[r][0])pp.push({x.a,f.b,2});
             }
         }
         else
         {
              for(auto f:v[x.b])
                if(!c[f.b][x.c]&&a[f.b][0]+a[f.b][1]==a[r][0]){
                if(a[x.b][0]+a[f.b][1]+f.a==a[r][0]&&x.c==3)             pp.push({x.a,f.b,3});
                    if(a[f.b][0]+a[x.b][1]+f.a==a[r][0]&&x.c==2)pp.push({x.a,f.b,2});
             }
         }

 }
 cout<<s4;
 }

Compilation message (stderr)

commuter_pass.cpp:48:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   48 | main()
      | ^~~~

• Subtask 1: 16 / 16
• Subtask 2: 15 / 15
• Subtask 3: 24 / 24
• Subtask 4: 45 / 45