foo.cc: In function 'void calc(int, int)':
foo.cc:9:10: warning: suggest parentheses around comparison in operand of '|' [-Wparentheses]
    9 |    if(ans>minn|now>6) return;
      |       ~~~^~~~~
foo.cc:24:13: warning: suggest parentheses around comparison in operand of '&' [-Wparentheses]
   24 |      if(a[5]==0 & ans<minn) minn=ans;
      |         ~~~~^~~
foo.cc: In function 'int main()':
foo.cc:44:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   44 |   scanf("%d",&n);
      |   ~~~~~^~~~~~~~~
foo.cc:54:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   54 |   scanf("%s",b);
      |   ~~~~~^~~~~~~~
foo.cc:47:11: warning: iteration 8 invokes undefined behavior [-Waggressive-loop-optimizations]
   47 |     has[i]=has[i-1]<<1;
      |     ~~~~~~^~~~~~~~~~~~
foo.cc:46:16: note: within this loop
   46 |   for(int i=2;i<=10;i++)
      |               ~^~~~

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