Compilare: user.cpp:6:24: warning: integer overflow in expression [-Woverflow] int kmod = (1 << 31) - 1; ^ user.cpp: In function ‘int main()’: user.cpp:33:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] }while(i < x.size() && inval != val); ^ user.cpp:34:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(i < x.size()) ^