c - Why does my code crash when I try to use input file with more than 100 edges? -

#include <stdio.h>  #define graphsize 2048 #define infinity graphsize*graphsize #define max(a, b) ((a > b) ? (a) : (b))  int e; /* number of nonzero edges in graph */ int n; /* number of nodes in graph */ long dist[graphsize][graphsize];  long d[graphsize];  int prev[graphsize];   void printpath(int dest) {     if (prev[dest] != -1)         printpath(prev[dest]);     printf("%d ", dest); }  void dijkstra(int s) {     int i, k, mini;     int visited[graphsize];      (i = 1; <= n; ++i) {         d[i] = infinity;         prev[i] = -1; /* no path has yet been found */         visited[i] = 0; /* i-th element has not yet been visited */     }      d[s] = 0;      (k = 1; k <= n; ++k) {         mini = -1;         (i = 1; <= n; ++i)             if (!visited[i] && ((mini == -1) || (d[i] < d[mini])))                 mini = i;          visited[mini] = 1;          (i = 1; <= n; ++i)             if (dist[mini][i])                 if (d[mini] + dist[mini][i] < d[i]) {                     d[i] = d[mini] + dist[mini][i];                     prev[i] = mini;                 }     } }  int main(int argc, char *argv[]) {     int i, j;     int u, v, w;      file *fin = fopen("/users/kostistougianni/downloads/networks/net100.txt", "r");     fscanf(fin, "%d", &e);     (i = 0; < e; ++i)         (j = 0; j < e; ++j)             dist[i][j] = 0;     n = -1;     (i = 0; < e; ++i) {         fscanf(fin, "%d%d%d", &u, &v, &w);         dist[u][v] = w;         n = max(u, max(v, n));     }     fclose(fin);      dijkstra(1);      printf("\n");     (i = 1; <= n; ++i) {         printf("path %d: ", i);         printpath(i);         printf("\n");     }      dijkstra(1);     printf("\n");     printf("path 1 100:");     printpath(100);      return 0; } 

my text looks like: 1 5 10 1 = u, 5 = v, 10 = w

the code works fine while use inout file 10-50 edges. after that, when give input file more 100 edges gives out crash without errors.