Compilare: main.cpp: In function 'void dfs(int)': main.cpp:17:19: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if(ok[i]=0){dfs(i);ok2=false;} ^ main.cpp:14:10: warning: variable 'ok2' set but not used [-Wunused-but-set-variable] { bool ok2=true; ^~~ main.cpp: In function 'int main()': main.cpp:24:19: warning: unused variable 'j' [-Wunused-variable] int n,m,x,y,i,j; ^