Compilare: main.cpp: In function 'void solve_1()': main.cpp:14:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for (int i = 0; i < nr.size() - 1; i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'bool solve()': main.cpp:28:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for (int i = 0; i < nr.size() - 1; i++) | ~~^~~~~~~~~~~~~~~ main.cpp:45:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 45 | if (maxx == nr.size()) | ~~~~~^~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:83:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | for (int i = 0; i < nr.size() && nr.size() != 0; i++) | ~~^~~~~~~~~~~