Compilare: main.cpp: In function 'int scan()': main.cpp:36:37: warning: self-comparison always evaluates to true [-Wtautological-compare] if((k & v[i][j]) ^ mask == mask) ~~~~~^~~~~~~ main.cpp:36:37: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses] main.cpp: In function 'void lee()': main.cpp:62:87: warning: self-comparison always evaluates to true [-Wtautological-compare] if(ok(nLin, nCol) && dist[nLin][nCol] == 0 && ((k & v[nLin][nCol]) ^ mask == mask)) ~~~~~^~~~~~~ main.cpp:62:87: warning: suggest parentheses around comparison in operand of '^' [-Wparentheses]