Compilare: user.cpp: In function ‘int main()’: user.cpp:29:49: warning: unused variable ‘begm’ [-Wunused-variable] int beg, minn = 0, end, last, len = 200005, begm = 200005; ^ user.cpp:59:15: warning: ‘beg’ may be used uninitialized in this function [-Wmaybe-uninitialized] else g << beg << ' ' << len; ^ user.cpp:46:25: warning: ‘last’ may be used uninitialized in this function [-Wmaybe-uninitialized] beg = last+1; ^