#include<stdio.h>
#include<stdlib.h>

typedef struct pNode {
        struct pNode *next;
        int edgeWeight;
} Node;

Node *list[100];

void addEdge(int i, int j, int k)
{
        Node *newNode;
        newNode = malloc(sizeof(Node));
        newNode->next = list[i];
        newNode->edgeWeight = k;
        list[i] = newNode;
}

int main()
{
        int n,i,j;
        scanf("%d%d",&n);
        for(i=0;i<n;i++)
        for(j=0;j<n;j++)
        {
                int k;
                scanf("%d",&k);
                if(k) addEdge(i,j,k);
        }
        return 0;
}