foo.cc: In function 'int main()':
foo.cc:101:39: warning: narrowing conversion of 'v[1].std::vector<int>::size()' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]
  101 |  vec.push_back(vector<ll>{1, v[1].size()});
      |                              ~~~~~~~~~^~
foo.cc:101:39: warning: narrowing conversion of 'v[1].std::vector<int>::size()' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]
foo.cc:103:45: warning: narrowing conversion of '(v[i].std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]
  103 |      vec.push_back(vector<ll>{1, v[i].size()-1});
      |                                  ~~~~~~~~~~~^~
foo.cc:103:45: warning: narrowing conversion of '(v[i].std::vector<int>::size() - 1)' from 'std::vector<int>::size_type' {aka 'long unsigned int'} to 'long long int' [-Wnarrowing]

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