[AGC056C]01Balanced差分约束系统，Dijkstra算法差分约束系统的常见优化：前缀和。然后乱搞定义把边权全部变成非负即可。Code#include<bits/stdc++.h>#definelllonglong#definepfprintf#definesfscanfusingnamespacestd;constintN=1e6+7;intn,m;intu,v,