Compilare: user.cpp: In function ‘bool cmp(punct, punct)’: user.cpp:24:7: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(a.y*b.x==b.y*a.x) ^ user.cpp: In function ‘void solve()’: user.cpp:54:19: warning: unused variable ‘p’ [-Wunused-variable] int m=1,MAX=0,p=1,nr=0; ^