Compilare: main.cpp: In function 'int main()': main.cpp:121:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Pct*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 121 | for (int i = 0; i < v.size() - 1; i++) | ~~^~~~~~~~~~~~~~ main.cpp:135:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Pct*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 135 | for (int i = 0; i < v.size() - 1; i++) | ~~^~~~~~~~~~~~~~ main.cpp:157:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Pct*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 157 | for (int i = 0; i < v.size(); i++) | ~~^~~~~~~~~~