Submission #312194

#	Time	Username	Problem	Language	Result	Execution time	Memory
312194		tjdgus4384	Arranging Shoes (IOI19_shoes)	C++14	25 / 100	34 ms	4284 KiB

shoes

#include<bits/stdc++.h>
using namespace std;
vector<int> v[100001];

long long count_swaps(vector<int> S){
    if(S.size() == 2){
        if(S[0] > 0) return 1;
        else return 0;
    }
    bool flag = false;
    for(int i = 1;i < S.size();i++){
        if(abs(S[i]) != abs(S[i - 1])) flag = true;
    }
    if(!flag){
        long long ret = 0;
        int cnt = 0;
        for(int i = 0;i < S.size();i++){
            if(S[i] < 0){
                ret += abs(cnt*2-i);
                cnt++;
            }
        }
    }
    return S.size()/2*(S.size()/2 - 1)/2;
}

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:11:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i = 1;i < S.size();i++){
      |                   ~~^~~~~~~~~~
shoes.cpp:17:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |         for(int i = 0;i < S.size();i++){
      |                       ~~^~~~~~~~~~

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