ACM-ICPC 2018 南京賽區網絡預賽__L. Magical Girl Haze 【Dijkstra算法+分層圖思想】

 1000ms  262144K There are N cities in the country, and M directional roads from u to v(1≤u,v≤n). Every road has a distance ci​. Haze is a Magical Girl that lives in City 1, she can choose no more tha
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