/in/foo.cc: In function 'void DP(int, int)':
/in/foo.cc:43:33: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   dp[x].w=dp[ch[x][0]].w|(1<<dep-1);
                              ~~~^~
/in/foo.cc:48:33: warning: suggest parentheses around '-' inside '<<' [-Wparentheses]
   dp[x].w=dp[ch[x][1]].w|(1<<dep-1);
                              ~~~^~