Problem: Constraints

* 1 ≤ |V| ≤ 1000
* 0 ≤ |E| ≤ 2000
* -10000 ≤ di ≤ 10000
* There are no parallel edges
* There are no self-loops

Input

An edge-weighted graph G (V, E) and the source r.


|V| |E| r
s0 t0 d0
s1 t1 d1
:
s|E|-1 t|E|-1 d|E|-1


|V| is the number of vertices and |E| is the number of edges in G. The graph vertices are named with the numbers 0, 1,..., |V|-1 respectively. r is the source of the graph.

si and ti represent source and target vertices of i-th edge (directed) and di represents the cost of the i-th edge.

Output

If the graph contains a negative cycle (a cycle whose sum of edge costs is a negative value) which is reachable from the source r, print


NEGATIVE CYCLE


in a line.

Otherwise, print


c0
c1
:
c|V|-1


The output consists of |V| lines. Print the cost of the shortest path from the source r to each vertex 0, 1, ... |V|-1 in order. If there is no path from the source to a vertex, print "INF".

Examples

Input

4 5 0
0 1 2
0 2 3
1 2 -5
1 3 1
2 3 2


Output

0
2
-3
-1


Input

4 6 0
0 1 2
0 2 3
1 2 -5
1 3 1
2 3 2
3 1 0


Output

NEGATIVE CYCLE


Input

4 5 1
0 1 2
0 2 3
1 2 -5
1 3 1
2 3 2


Output

INF
0
-5
-3

Solution (in CPP):

Solution:
#include<iostream>
#include<vector>
#include<queue>

using namespace std;
  
#define NOT -100000*2100
#define VMAX 1000
#define EMAX 2000

int main(void){
	
	int V,E,r;
	int s,t,d;
	int v[VMAX];
	int cnt;
	vector<int> ed[VMAX];
	vector<int> edco[VMAX];
	queue<int> no;

	cin>>V>>E>>r;

	for(int i=0;i<V;i++) v[i]=NOT;
;
	for(int i=0;i<E;i++){
		cin>>s>>t>>d;
		ed[s].push_back(t);
		edco[s].push_back(d);
	}

	no.push(r);
	v[r]=0;
	cnt=0;
	while(!no.empty()){
		if(cnt>20000){
			cout<<"NEGATIVE CYCLE"<<endl;
			return 0;
		}
		for(int i=0;i<ed[no.front()].size();i++){
			if(v[no.front()]+edco[no.front()][i]<v[ed[no.front()][i]]||v[ed[no.front()][i]]==NOT){
				v[ed[no.front()][i]]=v[no.front()]+edco[no.front()][i];
				cnt++;
				no.push(ed[no.front()][i]);
			}
		}
		no.pop();
	}

	for(int i=0;i<V;i++){
		if(v[i]!=NOT) cout<<v[i]<<endl;
		else cout<<"INF"<<endl;
	}
}