제출 #1268832

#제출 시각아이디문제언어결과실행 시간메모리
1268832FaresSTHArranging Shoes (IOI19_shoes)C++20
컴파일 에러
0 ms0 KiB
#include"bits/stdc++.h" using namespace std; using ll=long long; #define S second #define F first ll count_swaps(vector<int>a){ ll res=0; set<int>p[2]; int n=a.size(); for(int i=0;i<n;i++){ if(a[i]<0)p[0].insert(i); else p[1].insert(i); } for(int i=0;i<n;i++){ auto *it=p[i%2].lower_bound(i); p[i%2].erase(it); p[i%2].insert(i); p[1-i%2].insert(it); p[1-i%2].erase(i); res+=it-i; } return res; } // MalekLoky 3mk

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'll count_swaps(std::vector<int>)':
shoes.cpp:15:44: error: unable to deduce 'auto*' from 'p[(i % 2)].std::set<int>::lower_bound(i)'
   15 |                 auto *it=p[i%2].lower_bound(i);
      |                          ~~~~~~~~~~~~~~~~~~^~~
shoes.cpp:15:46: note:   mismatched types 'auto*' and 'std::_Rb_tree_const_iterator<int>'
   15 |                 auto *it=p[i%2].lower_bound(i);
      |                                              ^