Compilare: main.cpp: In function 'std::string solve(std::vector<int>&)': main.cpp:13:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | if(cnt < v.size()) | ~~~~^~~~~~~~~~ main.cpp:16:25: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 16 | for(int i = 0;i < v.size();++i) | ~~^~~~~~~~~~ main.cpp:35:33: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 35 | for(int j = 0;j < tmp.size();++j) | ~~^~~~~~~~~~~~