알고리즘 문제 통행료

문제  https://github.com/Hline/algorithm/blob/master/SW210813_%ED%86%A8%EB%B9%84/%ED%86%A8%EB%B9%84.txt

 

샘플케이스

https://github.com/Hline/algorithm/blob/master/SW210813_%ED%86%A8%EB%B9%84/in