Compilare: main.cpp: In function 'void debug(std::vector<int>)': main.cpp:9:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 9 | for(int i = 1; i < v.size(); i++) | ~~^~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:28:22: warning: unused variable 'pred' [-Wunused-variable] 28 | long long s = 0, pred = 0; | ^~~~