Anagrams

input/code.cpp: In function 'int main()':
input/code.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(size_t i=0;i<n;i++){cin>>a;b=a;sort(a.begin(),a.end());v.push_back({a,b});}
                 ~^~
input/code.cpp:16:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(size_t i=0;i<n;i++){
                 ~^~
input/code.cpp:21:12: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   while(j+i<n){
         ~~~^~
input/code.cpp:37:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(size_t j=0;j<res0[i];j++) cout<<res1[i][j]<<"\n";

#include<bits/stdc++.h>
using namespace std;


int main(){
 ios_base::sync_with_stdio(0);
 int n;
 cin>>n;
 vector<pair<string,string>> v;
 string a,b;
 for(size_t i=0;i<n;i++){cin>>a;b=a;sort(a.begin(),a.end());v.push_back({a,b});}
 sort(v.begin(),v.end());
 vector<long long> res0;
 vector<vector<string>> res1;

 for(size_t i=0;i<n;i++){
  // cout<<i<<"\n";
  long long count=0;
  vector<string> res;
  size_t j=0;bool ok=0;
  while(j+i<n){
  // cout<<v[i].first<<" "<<v[i+j].first<<"\n";
  if(v[i].first==v[j+i].first){res.push_back(v[i+j].second);count++;}
  else{ok=1;break;}
  j++;
  }
  if(ok) j--;
  if(count==1) continue;  
  res0.push_back(count);
  res1.push_back(res);
  // cout<<"j "<<j<<"\n";
  i+=j;
 }
 cout<<res0.size()<<"\n";
 for(size_t i=0;i<res0.size();i++){
  cout<<res0[i]<<"\n";
  for(size_t j=0;j<res0[i];j++) cout<<res1[i][j]<<"\n";
 }
 
 return 0;
}

Test 1

Verdict: UNKNOWN

Test 2

Verdict: UNKNOWN

Test 3

Verdict: UNKNOWN

Test 4

Verdict: UNKNOWN

Test 5

Verdict: UNKNOWN

Test 6

Verdict: UNKNOWN

Test 7

Verdict: UNKNOWN

Test 8

Verdict: UNKNOWN

Test 9

Verdict: UNKNOWN