foo.cc: In function 'int main()':
foo.cc:26:24: warning: value computed is not used [-Wunused-value]
   26 |                 flag[i]==true;
      |                 ~~~~~~~^~~~~~
foo.cc:30:15: warning: 'm' may be used uninitialized [-Wmaybe-uninitialized]
   30 |         cout<<m;
      |               ^

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