foo.cc: In function 'int main()':
foo.cc:19:21: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
   19 |             scanf("%d",&a[i][j]);
      |                    ~^  ~~~~~~~~
      |                     |  |
      |                     |  long long int*
      |                     int*
      |                    %lld
foo.cc:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |     scanf("%d %d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~
foo.cc:19:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   19 |             scanf("%d",&a[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~
foo.cc:13:13: warning: iteration 79 invokes undefined behavior [-Waggressive-loop-optimizations]
   13 |         p[i]=p[i-1]*2;
      |         ~~~~^~~~~~~~~
foo.cc:12:18: note: within this loop
   12 |     for(int i=1;i<=80;i++){
      |                 ~^~~~

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