Submission #990098

#	Time	Username	Problem	Language	Result	Execution time	Memory
990098		modwwe	Robot (JOI21_ho_t4)	C++17	100 / 100	155 ms	33676 KiB

Main

///#pragma GCC optimize("Ofast,unroll-loops")
///#pragma GCC target("avx,avx2,sse,sse2")
#include<bits/stdc++.h>
#define int long long
///#define ll long long
#define down cout<<'\n';
#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 mod2=998244353;
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;
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.b>b.b;
    }
};
bool color[100001];
int dp[100001];
int dp2[200001];
priority_queue<ib,vector<ib>,cmp>p;
vector<ic> v[100001];
void phongbeo()
{
    cin>>n>>m;
     for(int i=1;i<=m;i++)
     {
          cin>>l>>r>>s2>>s3;
          v[l].pb({r,s2,s3});
          v[r].pb({l,s2,s3});
     }
     p.push({1,0});
for(int i=1;i<=n;i++)
    dp[i]=1e18;
    for(int i=1;i<=m;i++)
        dp2[i]=1e18;
 dp[1]=0;
     while(!p.empty())
     {
          ib u=p.top();
          p.pop();
          if(u.a==n){cout<<u.b; exit(0);}
          if(color[u.a]) continue;
     color[u.a]=1;
     dp[u.a]=u.b;
      for(auto x:v[u.a])
      {
         dp2[x.b]=min(dp2[x.b],dp[x.a]);
         dp2[x.b]=min(dp2[x.b],u.b);
      }
      for(auto x:v[u.a])
      {
       dp2[x.b]+=x.c;
      }
      for(auto x:v[u.a])
      {
          p.push({x.a,u.b+x.c});
          if(dp2[x.b]<=1e18&&color[x.a]==0){
          p.push({x.a,dp2[x.b]-x.c});
          }
      }
      for(auto x:v[u.a])
        dp2[x.b]=1e18;
     }
     cout<<-1;
}

Compilation message (stderr)

Main.cpp:45:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   45 | main()
      | ^~~~
Main.cpp: In function 'void phongbeo()':
Main.cpp:77:1: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   77 | for(int i=1;i<=n;i++)
      | ^~~
Main.cpp:79:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   79 |     for(int i=1;i<=m;i++)
      |     ^~~

• Subtask 1: 34 / 34
• Subtask 2: 24 / 24
• Subtask 3: 42 / 42