Compilare: user.cpp: In function ‘void Add(int, int, int, int)’: user.cpp:19:14: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if (dp[1 - poz & 1][i] != -1){ ^ user.cpp:40:37: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[poz & 1][ans] = max(dp[1 - poz & 1][ans], dp[1 - poz & 1][i] + 1); ^ user.cpp:40:59: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[poz & 1][ans] = max(dp[1 - poz & 1][ans], dp[1 - poz & 1][i] + 1); ^ user.cpp:45:47: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[poz & 1][i] = max(dp[poz & 1][i], dp[1 - poz & 1][i]); ^ user.cpp: In function ‘int main()’: user.cpp:48:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ssce.in", "r", stdin); ^ user.cpp:49:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ssce.out", "w", stdout); ^ user.cpp:51:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &b, &k); ^ user.cpp:60:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^