Compilare: main.cpp: In function 'void citire()': main.cpp:29:6: warning: unused variable 'val' [-Wunused-variable] 29 | int val = (1 << s) - 1; | ^~~ main.cpp: In function 'int main()': main.cpp:85:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for (int i = 0; i < v.size(); i++) | ~~^~~~~~~~~~