Compilare: user.cpp: In function ‘int main()’: user.cpp:40:30: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][0]=2*dp[1-i&1][0]+1; ^ user.cpp:41:30: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][1]=2*dp[1-i&1][1]; ^ user.cpp:44:28: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][0]=dp[1-i&1][1]+dp[1-i&1][0]; ^ user.cpp:44:41: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][0]=dp[1-i&1][1]+dp[1-i&1][0]; ^ user.cpp:45:28: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][1]=dp[1-i&1][0]+dp[1-i&1][1]+1; ^ user.cpp:45:41: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i&1][1]=dp[1-i&1][0]+dp[1-i&1][1]+1; ^ user.cpp: In function ‘char nextch()’: user.cpp:11:31: 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); ^