Compilare: main.cpp: In function 'long long int calc()': main.cpp:85:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(i=0; i<vec.size(); i++) | ~^~~~~~~~~~~ main.cpp:113:15: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 113 | for(i=0; i<vec.size(); i++) | ~^~~~~~~~~~~ main.cpp:80:17: warning: unused variable 'j' [-Wunused-variable] 80 | long long i,j,curr; | ^ main.cpp: In function 'int main()': main.cpp:133:19: warning: unused variable 'j' [-Wunused-variable] 133 | long long n,i,j,k,l,curr; | ^ main.cpp:133:21: warning: unused variable 'k' [-Wunused-variable] 133 | long long n,i,j,k,l,curr; | ^ main.cpp:133:23: warning: unused variable 'l' [-Wunused-variable] 133 | long long n,i,j,k,l,curr; | ^