A: I submitted my code to problem B and I was redirected to my submissions page there were no entries in the submissions page ! I had to refresh the page to see my submission !
Edit : also after refreshing the page again I saw the same submission which already had WA verdict re-running the pretests again and surely gave the same WA !
B: These two submissions (Problem B) :
the only difference is that in the first one I used :
while(scanf("%c" , &c)==1)
to get all the characters from the input and I got "Wrong answer on pretest 1"
in the second one I used the c++ cin to get the whole string first then process it :
cin>>s;
and I got "Pretests passed" costing me +7 minutes to get it accepted :(
why did this happen ????? thought scanf() works until it reaches end of file !
while(scanf(" %c" , &c)==1)Because
scanf("%c", &c)will read a new line character'\n'.but there is not empty line nor spaces in the input ?
The input ends with a newline. This is true for almost all problems.