Compilare: main.cpp:29:21: warning: built-in function 'exp' declared as non-function [-Wbuiltin-declaration-mismatch] 29 | int n,pmax,x,y,coef,exp,i; | ^~~ main.cpp: In function 'int main()': main.cpp:40:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for(i=1; i<v.size(); i++) | ~^~~~~~~~~