Compilare: user.cpp: In function ‘void parc(int, int)’: user.cpp:8:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define FOR(i,s,d) for(i=(s);i<(d);++i) ^ user.cpp:19:5: note: in expansion of macro ‘FOR’ FOR(j,0,g[i].sz) ^ user.cpp: In function ‘int main()’: user.cpp:30:26: warning: second operand of conditional expression has no effect [-Wunused-value] fo<<a[y]<0?-a[y]:a[y]; ^ user.cpp:30:25: warning: third operand of conditional expression has no effect [-Wunused-value] fo<<a[y]<0?-a[y]:a[y]; ^