oj.uz

답안 #1067558

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
1067558 2024-08-20T20:18:24 Z Dennis_Jason Construction Project 2 (JOI24_ho_t2) C++14
0 / 100
 2000 ms 18668 KB 
#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 1000000007
#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();
        if(dist[first]<dis)
            continue;
        for(auto [u,w]:G[node])
        {
            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;
}

Compilation message

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:59:18: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   59 |         for(auto [u,w]:G[node])
      |                  ^

Subtask #1
0.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 5 ms 5212 KB Output is correct
6 Correct 5 ms 5212 KB Output is correct
7 Execution timed out 2060 ms 18668 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #2
0.0 / 16.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Incorrect 1 ms 4956 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #3
0.0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 4952 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Incorrect 1 ms 4956 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0.0 / 47.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4956 KB Output is correct
2 Correct 2 ms 4956 KB Output is correct
3 Correct 1 ms 4956 KB Output is correct
4 Correct 1 ms 4956 KB Output is correct
5 Correct 5 ms 5212 KB Output is correct
6 Correct 5 ms 5212 KB Output is correct
7 Execution timed out 2060 ms 18668 KB Time limit exceeded
8 Halted 0 ms 0 KB -