Compilare: user.cpp: In function ‘int main()’: user.cpp:53:35: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] memcpy(dp[i & 1], dp[1 - i & 1], sizeof(dp[1 - i & 1])); ^ user.cpp:53:57: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] memcpy(dp[i & 1], dp[1 - i & 1], sizeof(dp[1 - i & 1])); ^ user.cpp:57:36: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][j] = dp[1 - i & 1][j]; ^ user.cpp:62:26: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if(dp[1 - i & 1][j - i * cnt] > -1) ^ user.cpp:63:64: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][j] = std::max(dp[i & 1][j], dp[1 - i & 1][j - i * cnt] + sum); ^ user.cpp: In function ‘char nextch()’: user.cpp:12:32: warning: ignoring return value of ‘size_t fread(void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] fread(buf, 1, MAXBUF, fi); ^