Compilare: user.cpp: In function ‘int main()’: user.cpp:37:51: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][j] = add(dp[i & 1][j], dp[1 - i & 1][j]); ^ user.cpp:41:37: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][r] = add(dp[1 - i & 1][j], dp[i & 1][r]); ^ user.cpp:31:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d %d " ,&n,&k); ^ user.cpp:34:29: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fi,"%d " ,&x); ^