Compilare: main.cpp: In function 'int main()': main.cpp:49:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for (i = 1; i < v.size() - 3; i++) { | ~~^~~~~~~~~~~~~~ main.cpp:62:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 62 | for (i = v.size() - 2; i < v.size() - 1; i++) { | ~~^~~~~~~~~~~~~~ main.cpp:81:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for (i = 0; i < v.size(); i++) | ~~^~~~~~~~~~