foo.cc: In function 'int main()':
foo.cc:6:18: warning: comparison of integer expressions of different signedness: 'int' and 'unsigned int' [-Wsign-compare]
    6 |     for(int i=1;i<=n;i++)
      |                 ~^~~
foo.cc:15:29: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare]
   15 |                         if(a==x||(a>x&&a>0)){
      |                            ~^~~
foo.cc:15:36: warning: comparison of integer expressions of different signedness: 'unsigned int' and 'int' [-Wsign-compare]
   15 |                         if(a==x||(a>x&&a>0)){
      |                                   ~^~
foo.cc:5:20: warning: unused variable 'cnt' [-Wunused-variable]
    5 |     unsigned int a,cnt=0,n;cin>>n;
      |                    ^~~

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