Sanalista

input/code.cpp: In function 'int main()':
input/code.cpp:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<s.size();i++)
                 ~^~~~~~~~~
input/code.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<s[i].length();j++)
                     ~^~~~~~~~~~~~~~
input/code.cpp:25:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
             for(int k=0;k<c.size();k++)
                         ~^~~~~~~~~
input/code.cpp:41:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int j=0;j<a.size();j++)
                     ~^~~~~~~~~

#include <bits/stdc++.h>

using namespace std;

int n;
vector<string> s;

int main()
{
    cin>>n;
    string x;
    for(int i=0;i<n;i++)
    {
        cin>>x;
        s.push_back(x);
    }
    int r=0;
    for(int i=0;i<s.size();i++)
    {
        vector<char> c;
        vector<int> a;
        for(int j=0;j<s[i].length();j++)
        {
            bool f = false;
            for(int k=0;k<c.size();k++)
            {
                if(c[k]==s[i][j])
                {
                    f=true;
                    a[k]++;
                    break;
                }
            }
            if(!f)
            {
                c.push_back(s[i][j]);
                a.push_back(1);
            }
        }
        bool ac=true;
        for(int j=0;j<a.size();j++)
        {
            if(a[j]%2!=0)
            {
                ac=false;
                break;
            }
        }
        if(ac) r++;
    }
    cout<<r;
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED