Submission #316785

#	Time	Username	Problem	Language	Result	Execution time	Memory
316785		Tahmid690	Arranging Shoes (IOI19_shoes)	C++14	25 / 100	36 ms	3192 KiB

shoes

#include<bits/stdc++.h>
#include "shoes.h"
using namespace std;
long long count_swaps(vector<int> ara){
    int flag=0;
    for(int i=1;i<ara.size();i++) if(abs(ara[i])!=abs(ara[i-1])) flag=1;
    if(flag==0){
        long long ans=0;
        long long m,x=0;
        m=ara.size()/2;
        for(int i=0;i<ara.size();i++){
            if(ara[i]<0){
                if(i%2==1) ans++;
                
            }
        }
        
        return ans;
        
        
    }
  long long n;
    n=ara.size();
    n/=2;
    if(n==1){
        if(ara[0]<0) return 0;
    else return 1;
    }
    
    return (n*(n-1))/2;
}

/*int main(){
    int n;
    cin >> n;
    vector<int> vct;
    while(n--){
        int x;
        cin >> x;
        vct.push_back(x);
    }
    cout << count_swaps(vct) << endl;
}*/

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 |     for(int i=1;i<ara.size();i++) if(abs(ara[i])!=abs(ara[i-1])) flag=1;
      |                 ~^~~~~~~~~~~
shoes.cpp:11:22: 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=0;i<ara.size();i++){
      |                     ~^~~~~~~~~~~
shoes.cpp:9:19: warning: variable 'm' set but not used [-Wunused-but-set-variable]
    9 |         long long m,x=0;
      |                   ^
shoes.cpp:9:21: warning: unused variable 'x' [-Wunused-variable]
    9 |         long long m,x=0;
      |                     ^

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