P9011 [USACO23JAN] Air Cownditioning II B(差分优化+dfs)
思路:看到Nusingnamespacestd;#defineintlonglongconstintN=1e2+10;intb[N];structE{inta,b,p,w;}e[11];intn,m,mmin=1>n>>m;for(inti=1;i>s>>t>>c;//for(intj=s;j>e[i].a>>e[i].b>>e[i].p>>e[i].w;}dfs(1,0);cout>tt;whi