https://mirror.codeforces.com/problemset/problem/1063/B this question can be done with djikstra as well. but dont know y its giving TLE. https://ideone.com/Az9ZAL (its properly commented -running and no templates are used so wont be tough to read) .using djikstra i am assigning 1 unit weight to all the left edges. if anyone can suggest any optimization i would be very thankful.