/in/foo.cc: In function 'int main()':
/in/foo.cc:49:28: warning: 'edi' may be used uninitialized in this function [-Wmaybe-uninitialized]
   while (sg+a[i+1]-a[i]<=l && i<edi) sg+=a[i+1]-a[i],i++;
          ~~~~~~~~~~~~~~~~~~^~~~~~~~
/in/foo.cc:6:28: warning: 'sti' may be used uninitialized in this function [-Wmaybe-uninitialized]
  long long a[100010],st,ed,sti,edi;
                            ^~~