Compilare: main.cpp: In function 'int main()': main.cpp:127:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Pct*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 127 | for (int i = 0; i < v.size() - 1; i++) | ~~^~~~~~~~~~~~~~ main.cpp:141:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Pct*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 141 | for (int i = 0; i < v.size() - 1; i++) | ~~^~~~~~~~~~~~~~ main.cpp:160:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Pct*>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 160 | for (int i = 0; i < v.size(); i++) | ~~^~~~~~~~~~