foo.cc: In function 'int main()':
foo.cc:18:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=1;i<=min(n,m);i++){
                 ~^~~~~~~~~~
foo.cc:10:34: warning: unused variable 't' [-Wunused-variable]
     unsigned long long n,m,ans=0,t,cnt=0;
                                  ^
foo.cc:10:36: warning: unused variable 'cnt' [-Wunused-variable]
     unsigned long long n,m,ans=0,t,cnt=0;
                                    ^~~

自豪地采用[jd5](https://github.com/masnn/jd5)进行评测