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>

using namespace std;

const int INF = 1 << 29;

struct edge {
    int s, t, d;
};

int main() {

    int V, E, r;
    cin >> V >> E >> r;

    vector<edge> G;
    int d[V];

    for (int i = 0; i < E; i++) {
        int s, t, d;
        cin >> s >> t >> d;
        G.emplace_back((edge) {s, t, d});
    }

    fill(d, d + V, INF);
    d[r] = 0;
    bool negative = false;

    for (int i = 0; i <= V; i++) {
        for (edge e : G) {
            if (d[e.s] != INF && d[e.t] > d[e.s] + e.d) {
                d[e.t] = d[e.s] + e.d;
                if (i == V) {
                    negative = true;
                    goto outer;
                }
            }
        }
    }
    outer:

    if (negative) {
        cout << "NEGATIVE CYCLE" << endl;
    } else {
        for (int i = 0; i < V; i++) {
            cout << (d[i] != INF ? to_string(d[i]) : "INF") << endl;
        }
    }
}