제출 #699550

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
699550		Alihan_8	Arranging Shoes (IOI19_shoes)	C++17	50 / 100	1081 ms	3124 KiB

shoes

#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
//#define int long long
long long count_swaps(vector<int> p) {
    int n = (int)p.size();
    long long cnt = 0;
    for ( int i = 0; i < n; i++ ){
        int j = i;
        while ( j < n and p[j] != -p[i] ) j++;
        assert(j < n);
        for ( int k = j-1; k > i-(p[i] >= 0); k-- ){
            cnt++; swap(p[k], p[k+1]);
        }
        i++;
    }
    return cnt;
}

컴파일 시 표준 에러 (stderr) 메시지

shoes.cpp: In function 'void IO(std::string)':
shoes.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
shoes.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 15
• Subtask 5: 20 / 20
• Subtask 6: 0 / 15