/in/foo.cc: In function 'int main()':
/in/foo.cc:20:16: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
     if (a >= 11&&a-b>=2||b>=11&&b-a>=2) 
                ^
/in/foo.cc:36:16: warning: suggest parentheses around '&&' within '||' [-Wparentheses]
    if (a >= 21 && a - b >= 2 || b >= 21 && b - a >= 2)
                ^
/in/foo.cc:11:22: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    scanf("%c", &term); 
                      ^