Compilare: user.cpp: In function ‘int main()’: user.cpp:30:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i <= v.size()-1; i++) { ^ user.cpp:17:15: warning: unused variable ‘s’ [-Wunused-variable] int k, n, s = 1, nr = 0, first, last, y, mx; ^ user.cpp:17:30: warning: unused variable ‘first’ [-Wunused-variable] int k, n, s = 1, nr = 0, first, last, y, mx; ^ user.cpp:17:37: warning: unused variable ‘last’ [-Wunused-variable] int k, n, s = 1, nr = 0, first, last, y, mx; ^ user.cpp:17:43: warning: unused variable ‘y’ [-Wunused-variable] int k, n, s = 1, nr = 0, first, last, y, mx; ^ user.cpp:17:46: warning: unused variable ‘mx’ [-Wunused-variable] int k, n, s = 1, nr = 0, first, last, y, mx; ^