Runtime error (SIGSEGV) in GOSSIPER

Here is my code for question GOSSIPER, and i'm getting runtime error (SIGSEGV).
Can someone please tell me why.
Thankyou!

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
int main()
{
        int n, m, i, j, k, f1, f2, l, c;
        char n1[100], n2[100];
        while (1) {
                scanf("%d%d", &n, &m);
                if (n == 0 && m == 0) {
                        break;        
                }
                char name[n][100];
                int g[n][n];
                int count[n];
                for (i = 0; i < n; i++) {
                        fflush(stdin);
                        scanf("%s", name[i]);    
                        for (j = 0; j < n; j++) {
                                g[i][j] = 0;        
                        }    
                        g[i][i] = 1;
                        count[n] = 1;
                }
                for (i = 0; i < m; i++) {
                        fflush(stdin);
                        f1 = 0;
                        f2 = 0;
                        scanf("%s %s", n1, n2);
                        for (j = 0; j < n; j++) {
                                if (strcmp(n1, name[j]) == 0) {
                                        k = j;
                                        f1 = 1;        
                                } else if (strcmp(n2, name[j]) == 0) {
                                        l = j;
                                        f2 = 1;        
                                } else if (f1 == 1 && f2 == 1) {
                                        break;        
                                }
                        }
                        c = 0;
                        for (j = 0; j < n; j++) {
                                if (g[k][j] == 1 || g[l][j] == 1) {
                                        g[k][j] = 1;
                                        g[l][j] = 1;
                                        c++;   
                                }        
                        }
                        count[k] = c;
                        count[l] = c;
                }
                f1 = 1;
                for (i = 0; i < n; i++) {
                       if (count[i] < n) {
                                f1 = 0;
                                break;        
                        }         
                }
                if (f1 == 1) {
                        printf("YES\n");        
                } else {
                        printf("NO\n");
                }
        }
        system("pause");        
        return 0;
}