foo.cc: In function 'int main()':
foo.cc:6:13: warning: format '%d' expects argument of type 'int*', but argument 2 has type 'long long int*' [-Wformat=]
    6 |     scanf("%d%d",&n,&m);
      |            ~^    ~~
      |             |    |
      |             int* long long int*
      |            %lld
foo.cc:6:15: warning: format '%d' expects argument of type 'int*', but argument 3 has type 'long long int*' [-Wformat=]
    6 |     scanf("%d%d",&n,&m);
      |              ~^     ~~
      |               |     |
      |               int*  long long int*
      |              %lld
foo.cc:7:10: warning: variable 'flag' set but not used [-Wunused-but-set-variable]
    7 |     bool flag=0;
      |          ^~~~

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