Submission #436074

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
436074	2021-06-24 07:50:14	TLP39	Fountain Parks (IOI21_parks)	C++17	100 / 100	421 ms	68260 KiB

parks

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    #include "parks.h"
    #include<bits/stdc++.h>
    using namespace std;
    typedef pair<pair<int,int>,int> pp;
     
     
    int n;
    ///bench position
    int bench_lr[200010]={},bench_ba[200010]={};
    ///above,below,left,right;
    int a[200010],b[200010],l[200010],r[200010];
    ///sort to get a b l r
    vector<pp> fo,fo2;
    ///go back to find links: traceback above and below (get the x coor)
    int trace_a[200010],trace_b[200010];
    ///to get potential connected links (that shouldn't collide)
    int cur_y[200010],cur_x[200010];
    vector<pair<int,bool>> link;
    vector<int> adj[400010];
    int chosen[400010]={};
    ///check if every fountains are connected
    vector<int> adj2[200010];
     
    void changebench(int x)
    {
        if(x<0) return;
        if(a[x]<0) return;
        int temp=x;
        while(temp>=0 && a[temp]>=0 && bench_lr[temp]==-1)
        {
 
 
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Compilation message (stderr)

parks.cpp: In function 'void dfs(int, int)':
parks.cpp:39:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   39 |         for(int i=0;i<adj[v].size();i++)
      |                     ~^~~~~~~~~~~~~~
parks.cpp: In function 'void dfs_check(int)':
parks.cpp:50:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |         for(int i=0;i<adj2[v].size();i++)
      |                     ~^~~~~~~~~~~~~~~
parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:170:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  170 |         for(int i=0;i<link.size();i++)
      |                     ~^~~~~~~~~~~~
parks.cpp:175:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  175 |         for(int i=0;i<link.size();i++)
      |                     ~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30