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

#define N 5
#define M 30

int main(){
  int polje[N][M];
  int n;

  printf("Unesi velicinu stupaca: \n");
  do{
    scanf("%d",n);
  }while(n<=19||n>30);

  srand((unsigned)time(NULL));

  for(int i=0;i<N;i++){
    for(int j=0;j<n;j++){
      polje[i][j]= -14 + (int)rand() / RAND_MAX * 10;
    }
  }
return 0;
}