Submission #171636

#	Time	Username	Problem	Language	Result	Execution time	Memory
171636		ahmet	Biochips (IZhO12_biochips)	C++14	0 / 100	6 ms	5112 KiB

biochips

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define rep(i,n) for(long long (i)=0;(i)<(n);++(i))
#define ref(i,a,b) for (long long (i)=(a); (i)<=(b); ++(i))
#define endl '\n'
#define st first
#define nd second
#define pb push_back
#define mp make_pair
const int mx=2e5+5;
int n,m;
vector <int > v[mx];
vector <int> k;
int root,dp[mx][505],a[mx],res;
void git(int sir,int sum,int kac){
	if(kac>m)return;
	if(sir==k.size()){
		dp[res][kac]=max(dp[res][kac],sum);
		return;
	}
	dp[res][kac]=max(sum,dp[res][kac]);
	for(int i=0;i<=m;++i)git(sir+1,dp[k[sir]][i]+sum,kac+i);
	return;
}
void dfs(int x){
	k.clear();
	for(int i=0;i<v[x].size();++i){
		dfs(v[x][i]);
	}
	for(int i=0;i<v[x].size();++i){
		k.pb(v[x][i]);
	}
	res=x;
	git(0,0,0);
	dp[x][1]=max(dp[x][1],a[x]);
}
int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> m;
	for(int i=1;i<=n;++i){
		int x,y;cin >> x >> y;
		if(x==0)root=i;
		v[x].pb(i);
		a[i]=y;
	}
	dfs(root);
	//cout << dp[2][2]<<endl;
	cout << dp[root][m] <<endl;
}	

Compilation message (stderr)

biochips.cpp: In function 'void git(int, int, int)':
biochips.cpp:18:8: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  if(sir==k.size()){
     ~~~^~~~~~~~~~
biochips.cpp: In function 'void dfs(int)':
biochips.cpp:28:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v[x].size();++i){
              ~^~~~~~~~~~~~
biochips.cpp:31:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<v[x].size();++i){
              ~^~~~~~~~~~~~

• Subtask 1: 0 / 100