Compilare: main.cpp: In function 'void solve(std::vector<std::vector<int> >&, std::vector<std::vector<int> >&)': main.cpp:57:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int i = 0;i < m.size();++i) | ~~^~~~~~~~~~ main.cpp:78:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(int i = 0;i < m.size();++i) | ~~^~~~~~~~~~ main.cpp:81:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for(int j = 0;j < v.size();++j) | ~~^~~~~~~~~~ main.cpp:95:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 95 | for(int j = 0;j < vecs[a][1].size();++j) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:98:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 98 | for(int j = 0;j < vecs[a][0].size();++j) | ~~^~~~~~~~~~~~~~~~~~~ main.cpp:107:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | for(int k = 0;k < v.size();++k) | ~~^~~~~~~~~~