Compilare: user.cpp: In function ‘void Add(int, int, int, int)’: user.cpp:61:14: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if (dp[1 - poz & 1][i]){ ^ user.cpp:96:33: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[poz & 1][ans] = dp[1 - poz & 1][i] + 1; ^ user.cpp:101:50: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[poz & 1][i] = my_max(dp[poz & 1][i], dp[1 - poz & 1][i]); ^ user.cpp: In function ‘int main()’: user.cpp:105:35: 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: In member function ‘char InParser::read_ch()’: user.cpp:19:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^