foo.cc: In function 'bool IsMax(std::vector<int>&, int)':
foo.cc:7:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
7 | for(int i=0; i<v.size(); i++)
| ~^~~~~~~~~
foo.cc: In function 'int Count(std::vector<std::vector<int> >&, int, int)':
foo.cc:19:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
19 | for(int i=0; i<M.size(); i++)
| ~^~~~~~~~~
foo.cc:20:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
20 | for(int j=0; j<M[i].size(); j++)
| ~^~~~~~~~~~~~
foo.cc: In function 'int main()':
foo.cc:40:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
40 | for(int i=0; i<M.size(); i++)
| ~^~~~~~~~~
foo.cc:41:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
41 | for(int j=0; j<M[i].size(); j++)
| ~^~~~~~~~~~~~
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