Anagrams

input/code.cpp: In function 'int main()':
input/code.cpp:22:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for (llu j = 0;j<s.size(); ++j){
                        ~^~~~~~~~~

#include <iostream>
#include <algorithm>
#include <string>
#include <bits/stdc++.h>
#define N 1000000
using namespace std;
using llu = long long signed;

map<llu, vector<string>> m;

int main()
{
    llu n;

    string s;
    
    cin >> n;

    for (llu i = 0;i<n;++i){
        cin >> s;
        llu sum = 0;
        for (llu j = 0;j<s.size(); ++j){
            sum += s[j];
        }
        if (m.find(sum) == m.end()) {
            m[sum] = vector<string>();
        }
        m[sum].push_back(s);
    }

    for (auto const& x : m)
    {
        
        std::cout << x.second.size() << endl;

        for (auto const& y : x.second) {
            std::cout << y << endl;
        }
    }
    return 0;
}

Test 1

Verdict: WRONG ANSWER

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: WRONG ANSWER

Test 4

Verdict: WRONG ANSWER

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: WRONG ANSWER

Test 9

Verdict: WRONG ANSWER