Compilare: user.cpp: In function ‘bool verif(int, int)’: user.cpp:15:37: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (dp[x][k] & dp[k + 1][y] == 1) ^ user.cpp:25:49: warning: suggest parentheses around comparison in operand of ‘&’ [-Wparentheses] if (dp[x + 1][k] & dp[k + 2][y - 1] == 1) ^ user.cpp: In function ‘int main()’: user.cpp:47:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (k <= s.size()) ^ user.cpp:49:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s.size() - k + 1; j++) ^ user.cpp:66:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int w = 0; w < s.size() - 3; w++) ^ user.cpp:67:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < s.size(); j++) ^