Submission #277703

#	Time	Username	Problem	Language	Result	Execution time	Memory
277703		Fasho	Magic Tree (CEOI19_magictree)	C++14	3 / 100	59 ms	23832 KiB

magictree

#include <bits/stdc++.h>
#define N 100005
#define ll long long int
#define fo(i,x,y)	for(int i=x;i<=y;i++)
#define fs(ar,n) fo(i,1,n) cin>>ar[i]
#define sp " "
#define fast cin.tie(0);cout.tie(0);ios_base::sync_with_stdio(false)
#define pb push_back
#define ppb pop_back
#define fi first
#define se second
#define ii pair<int,int>
#define lli pair<ll,ll> 
#define mod 1000000007
using namespace std;

ll n,m,ar[N],sum,t,k,dp[N][21],val[N];

vector<int> v[N];

ll f(int ind,int back,int l)
{
	if(dp[ind][l]!=-1)
		return dp[ind][l];
	ll t1=0;
	ll t2=0;
	for(int i=0;i<v[ind].size();i++)
		t1+=f(v[ind][i],ind,l);
	if(ar[ind]<l && ar[ind]!=0)
		for(int i=0;i<v[ind].size();i++)
			t2+=f(v[ind][i],ind,ar[ind]);

	if(ar[ind]<l && ar[ind]!=0)
		t2+=val[ind];
	if(ar[ind]==l && l!=0)
		t1+=val[ind];
	// cout<<ind<<sp<<l<<sp<<t1<<sp<<t2<<endl;
	return dp[ind][l]=max(t1,t2);
}

int main()
{
	fast;
	cin>>n>>m>>k;
	memset(dp,-1,sizeof(dp));
	fo(i,2,n)
	{
		int a;
		cin>>a;
		v[a].pb(i);
	}
	fo(i,1,m)
	{
		ll a,b,c;
		cin>>a>>b>>c;
		ar[a]=b;
		val[a]=c;
	}
	fo(i,1,n)
		sum+=val[i];
	cout<<sum<<endl;
	// cout<<endl;

	// fo(i,1,n)
	// cout<<val[i]<<sp;
	// cout<<endl;

	// cout<<f(1,1,20);

} 

Compilation message (stderr)

magictree.cpp: In function 'long long int f(int, int, int)':
magictree.cpp:27:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |  for(int i=0;i<v[ind].size();i++)
      |              ~^~~~~~~~~~~~~~
magictree.cpp:30:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |   for(int i=0;i<v[ind].size();i++)
      |               ~^~~~~~~~~~~~~~

• Subtask 1: 0 / 6
• Subtask 2: 3 / 3
• Subtask 3: 0 / 11
• Subtask 4: 0 / 12
• Subtask 5: 0 / 16
• Subtask 6: 0 / 13
• Subtask 7: 0 / 22
• Subtask 8: 0 / 17