Compilare: main.cpp: In function 'int main()': main.cpp:53:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 53 | for (i = 1; i < v.size() - 3; i++) { | ~~^~~~~~~~~~~~~~ main.cpp:67:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 67 | for (i = v.size() - 2; i < v.size() - 1; i++) { | ~~^~~~~~~~~~~~~~ main.cpp:86:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 86 | for (i = 0; i < v.size(); i++) | ~~^~~~~~~~~~