Submission #967358

#TimeUsernameProblemLanguageResultExecution timeMemory
967358owoovoFun Tour (APIO20_fun)C++17
10 / 100
77 ms15680 KiB
#include "fun.h" #include<bits/stdc++.h> #define ll long long #define F first #define S second using namespace std; vector<int> createFunTour(int n, int q) { int root=0,hf=(n+1)/2,mn=n; for(int i=0;i<n;i++){ int A=attractionsBehind(0,i); if(A>hf&&A<mn){ mn=A,root=i; } } int tr[100010],tc[3][100010]; vector<int> ch; priority_queue<pair<int,int>> sub[3]; for(int i=0;i<n;i++){ tr[i]=hoursRequired(root,i); if(tr[i]==1)ch.push_back(i); } int chsz=ch.size(); for(int i=0;i<chsz;i++){ for(int j=0;j<n;j++){ tc[i][j]=hoursRequired(ch[i],j); if(tc[i][j]<tr[j]){ sub[i].push({tr[j],j}); } } } int left=(n-1),mer=0,last=-1; vector<int> ans; while(left>0){ pair<int,int> best={0,-1}; for(int j=0;j<chsz;j++){ if(j!=last&&(!sub[j].empty())&&sub[j].top().F>best.F){ best={sub[j].top().F,j}; } } pair<int,int> mxsz={0,0}; for(int j=0;j<chsz;j++){ if(j!=last&&(!sub[j].empty())&&sub[j].size()>mxsz.F){ mxsz={sub[j].size(),j}; } } // if(mer==0&&mxsz.F*2>left){ // mer=1; // int lf=3-last-mxsz.S; // if(((!sub[lf].empty())&&(!sub[last].empty()))&&sub[lf].top().F>sub[last].top().F){ // left--; // last=lf; // auto [x,y]=sub[last].top(); // sub[last].pop(); // ans.push_back(y); // } // best.S=mxsz.S; // if(last==mxsz.S)last=(last+1)%3; // lf=3-last-mxsz.S; // while(!sub[lf].empty()){ // sub[last].push(sub[lf].top()); // sub[lf].pop(); // } // } if(best.S==-1){ for(int j=0;j<chsz;j++){ if(!sub[j].empty())best.S=j; } } auto [x,y]=sub[best.S].top(); sub[best.S].pop(); last=best.S; ans.push_back(y); left--; } ans.push_back(root); return ans; }

Compilation message (stderr)

fun.cpp: In function 'std::vector<int> createFunTour(int, int)':
fun.cpp:42:51: warning: comparison of integer expressions of different signedness: 'std::priority_queue<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   42 |       if(j!=last&&(!sub[j].empty())&&sub[j].size()>mxsz.F){
      |                                                   ^
fun.cpp:31:18: warning: unused variable 'mer' [-Wunused-variable]
   31 |   int left=(n-1),mer=0,last=-1;
      |                  ^~~
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