Compilare: user.cpp: In function ‘int main()’: user.cpp:61:51: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] else dp[i&1][j] = max(dp[i&1][j], dp[i&1^1][j]); ^ user.cpp:63:62: warning: suggest parentheses around arithmetic in operand of ‘^’ [-Wparentheses] dp[i&1][mask[i]] = max(dp[i&1][mask[i]], dp[i&1^1][j] + 1); ^