Compilare: user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define maxn 1<<20+1 ^ user.cpp:11:7: note: in expansion of macro ‘maxn’ int h[maxn],depth[maxn],pred[maxn],direction[maxn]; ^ user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define maxn 1<<20+1 ^ user.cpp:11:19: note: in expansion of macro ‘maxn’ int h[maxn],depth[maxn],pred[maxn],direction[maxn]; ^ user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define maxn 1<<20+1 ^ user.cpp:11:30: note: in expansion of macro ‘maxn’ int h[maxn],depth[maxn],pred[maxn],direction[maxn]; ^ user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define maxn 1<<20+1 ^ user.cpp:11:46: note: in expansion of macro ‘maxn’ int h[maxn],depth[maxn],pred[maxn],direction[maxn]; ^ user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define maxn 1<<20+1 ^ user.cpp:12:16: note: in expansion of macro ‘maxn’ vector <int> G[maxn]; ^ user.cpp:4:15: warning: suggest parentheses around ‘+’ inside ‘<<’ [-Wparentheses] #define maxn 1<<20+1 ^ user.cpp:13:8: note: in expansion of macro ‘maxn’ bool v[maxn]; ^