Compilare: user.cpp: In function ‘void read()’: user.cpp:69:18: warning: converting to non-pointer type ‘char’ from NULL [-Wconversion-null] e [++ h] = NULL; ^ user.cpp:23:34: warning: ‘g’ may be used uninitialized in this function [-Wmaybe-uninitialized] long n, i, l, c, val = 0, h, g, d, imp; ^ user.cpp: In function ‘void solve()’: user.cpp:102:5: warning: ‘jmax’ may be used uninitialized in this function [-Wmaybe-uninitialized] for (i = 2; i <= jmax; i ++) { ^ /tmp/ccb3qdEK.o: In function `read()': user.cpp:(.text+0x12): warning: the `gets' function is dangerous and should not be used.