foo.cc: In function 'int main()':
foo.cc:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   33 |  scanf("%d",&t);
      |  ~~~~~^~~~~~~~~
foo.cc:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   36 |   scanf("%d %d %d %d",&a,&b,&c,&k);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
foo.cc: In function 'int KSC(int, int, int)':
foo.cc:28:9: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   28 |  return ans;
      |         ^~~
foo.cc: In function 'int main()':
foo.cc:39:10: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   39 |    printf("%d\n",KSC(b-a,k-1,200907)+a);
      |    ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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