foo.cc: In function 'int main()':
foo.cc:15:11: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   cin>>cha+1;
        ~~~^~
foo.cc:34:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
    cin>>cha+1;
         ~~~^~

自豪的采用jd5进行评测(github.com/masnn/jd5)

{"receive":"2020-02-14T12:37:05.685Z","handle":"2020-02-14T12:37:05.685Z","cache_start":"2020-02-14T12:37:05.685Z","read_cases":"2020-02-14T12:37:08.010Z","judge":"2020-02-14T12:37:08.010Z","done":"2020-02-14T12:37:24.770Z"}