Submission #1073860

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Source Code Expand

#include <stdio.h>
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#define pii pair<int,int>
#define pll pair<ll,ll>
#define pdd pair<double,double>
#define FILL(a,x) memset(a,x,sizeof(a))
#define foreach( gg,ii ) for( typeof(gg.begin()) ii=gg.begin();ii!=gg.end();ii++)
#define mp make_pair
#define pb push_back
#define X first
#define Y second
#define sz(a) int((a).size())
#define N 1000010
#define MAX 30
#define mod 1000000007
#define REP(i,a) for(int i=0;i<a;++i)
#define REPP(i,a,b) for(int i=a;i<b;++i)
#define all(a) a.begin(),a.end()
const ll INF = 1e18+1;

ll a[N];
vector <ll> G[N];

int dfs(int v){
	int w,z=0;
	vector <int> x;
	REP(i,sz(G[v])){
		w=G[v][i];
		x.pb(dfs(w));
	}
	sort(all(x),greater<int>());
	REP(i,sz(x)){
		x[i]+=(i+1);
		z=max(z,x[i]);
	}
	return z;
}

int main()
{
	ll n,x=0,y;
	scanf("%lld",&n);
	REP(i,n-1){
		scanf("%lld",&x);
		x--;
		G[x].pb(i+1);
	}
	printf("%d\n",dfs(0));
return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:44:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lld",&n);
                  ^
./Main.cpp:46:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%lld",&x);
                   ^

Judge Result