foo.cc: In function 'int main()':
foo.cc:9:5: warning: this 'while' clause does not guard... [-Wmisleading-indentation]
    9 |     while (i<=n);
      |     ^~~~~
foo.cc:10:5: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'while'
   10 |     {
      |     ^
foo.cc:12:18: warning: 'k' is used uninitialized in this function [-Wuninitialized]
   12 |      while(j<=n-i+k)
      |               ~~~^~

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