Compilare: user.cpp: In function ‘int main()’: user.cpp:31:22: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] if((dp[1 - i & 1][j-1] + dp[i & 1][j-1]) == i) ^ user.cpp:34:38: warning: suggest parentheses around ‘-’ in operand of ‘&’ [-Wparentheses] dp[i & 1][j] = (dp[1 - i & 1][j-1] + dp[i & 1][j-1]); ^ user.cpp:41:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:23:23: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(in,"%d",&n); ^