제출 #1067574

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1067574		Dennis_Jason	Construction Project 2 (JOI24_ho_t2)	C++14	53 / 100	2102 ms	24836 KiB

Main

#include <bitset>
#include <cmath>
#include <functional>
#include <algorithm>
#include <numeric>
#include <deque>
#include <fstream>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <list>
#include <map>
#include <unordered_map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <vector>
#include <cstring>
#include <climits>
#define pb push_back
#define MOD 1000000007
#define NMAX 200001
#define nl '\n'
#define INF 1e18
#define pii1 pair<int, pair<int,int>>  (1,(1,2));
#define pii pair<int,int>
#define tpl tuple<int,int,int,int,int>
#define int long long
using namespace std;
ifstream fin("data.in");
ofstream fout("data.out");
/*
    ====================DEMONSTRATION======================
 
 
 
    =========================END===========================
 
 */
int n,m,s,t,l,k;
vector<int>v;
vector<vector<pii>>G(NMAX);
vector<int>dist_s,dist_t;
void dijkstra(int node,vector<int>&dist)
{
    priority_queue<pii,vector<pii>,greater<pii>>pq;
    for(int i=1;i<=n;++i)
        dist[i]=INF;
    dist[node]=0;
    pq.push({0,node});
    while(!pq.empty())
    {
        auto [dis,first]=pq.top();
        pq.pop();
        for(auto [u,w]:G[first])
        {
            if(dist[u]>dist[first]+w)
            {
                dist[u]=dist[first]+w;
                pq.push({dist[u],u});
            }
        }
 
    }
}
signed main() {
 
     cin>>n>>m;
     cin>>s>>t>>l>>k;
     dist_s.resize(n+1);
     dist_t.resize(n+1);
     for(int i=1;i<=m;++i)
     {
         int x,y,c;
         cin>>x>>y>>c;
         G[x].pb({y,c});
         G[y].pb({x,c});
     }
 
     dijkstra(s,dist_s);
     dijkstra(t,dist_t);
     if(dist_s[t]<=k)
     {
         cout<<(n*(n-1)/2);
         return 0;
     }
 
     sort(dist_t.begin()+1,dist_t.end());
     int ans=0;
     for(int i=1;i<=n;++i)
     {
         int dis=k-l-dist_s[i];
         int st=1;
         int dr=n;
         int pos=0;
         while(st<=dr)
         {
             int mid=(st+dr)/2;
             if(dist_t[mid]<=dis)
             {
                 pos=mid;
                 st=mid+1;
             }
             else
                 dr=mid-1;
         }
         ans+=pos;
     }
     cout<<ans;
 
 
 
 
 
 
 
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void dijkstra(long long int, std::vector<long long int>&)':
Main.cpp:55:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   55 |         auto [dis,first]=pq.top();
      |              ^
Main.cpp:57:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   57 |         for(auto [u,w]:G[first])
      |                  ^

• Subtask 1: 8 / 8
• Subtask 2: 16 / 16
• Subtask 3: 29 / 29
• Subtask 4: 0 / 47