Compilare: main.cpp: In function 'int main()': main.cpp:53:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (i = 0; i < gi.size() - 1; i++) | ~~^~~~~~~~~~~~~~~ main.cpp:54:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 54 | for (j = i + 1; j < gi.size(); j++) | ~~^~~~~~~~~~~ main.cpp:66:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 66 | for (j = 0; j < l[i].size(); j++) | ~~^~~~~~~~~~~~~ main.cpp:85:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for (i = 0; i < sol.size(); i++) | ~~^~~~~~~~~~~~ main.cpp:87:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 87 | for (j = 0; j < sol[i].size() - 1; j++) | ~~^~~~~~~~~~~~~~~~~~~