Compilare: main.cpp: In function 'int main()': main.cpp:38:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<bool, char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 38 | for (int j = 0; j < v1.size() && ok; j++) | ~~^~~~~~~~~~~ main.cpp:56:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<bool, char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int j = 0; j < v2.size() && ok; j++) | ~~^~~~~~~~~~~ main.cpp:78:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<bool, char> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for (int i = 0; i < v1.size() && ok; i++) | ~~^~~~~~~~~~~