Compilare: main.cpp: In function 'void dfs(int, long long unsigned int)': main.cpp:41:28: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses] ans[x]|=(ans[n]&tpas^tpas); ~~~~~~^~~~~ main.cpp:44:51: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses] else if ((ans[root(x)]&pas)!=(ans[root(n)]&tpas^tpas)) flag=true; ~~~~~~~~~~~~^~~~~ main.cpp:44:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if ((ans[root(x)]&pas)!=(ans[root(n)]&tpas^tpas)) flag=true; ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~