foo.cc: In function 'int main()':
foo.cc:16:25: warning: 'l' may be used uninitialized [-Wmaybe-uninitialized]
   16 |         for(int i = 1;i <= l;i++)
      |                       ~~^~~~
foo.cc:5:30: note: 'l' was declared here
    5 |         int n, m = 0, s = 0, l;
      |                              ^

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