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每个节点有权值,子节点和父节点不能同时选,问最后能选的最大价值是多少? 输入格式有点傻逼。
//#pragma comment(linker, "/STACK:1024000000,1024000000")#include #include #include #include #include #include #include #include #include #include #include #include #include #include using namespace std;typedef long long ll;typedef unsigned long long ull;typedef pair pii;#define pb(a) push_back(a)#define INF 0x1f1f1f1f#define lson idx<<1,l,mid#define rson idx<<1|1,mid+1,r#define PI 3.1415926535898template T min(const T& a,const T& b,const T& c) { return min(min(a,b),min(a,c));}template T max(const T& a,const T& b,const T& c) { return max(max(a,b),max(a,c));}void debug() {#ifdef ONLINE_JUDGE#else freopen("d:\\in.txt","r",stdin); // freopen("d:\\out1.txt","w",stdout);#endif}int getch() { int ch; while((ch=getchar())!=EOF) { if(ch!=' '&&ch!='\n')return ch; } return EOF;}vector g[6666];int val[6666];int dp[6666][2];int vis[6666][2];int f(int u,int st,int fa){ if(vis[u][st])return dp[u][st]; vis[u][st]=1; int &res=dp[u][st]; res=0; int num=0; for(int i=0;i
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