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

#define SIZE 100

int checkMinHeap(const long* arr, const int size){
    //printf("size: %d\n",size);
    if(size == 1){
        return 1;
    }
    if(size == 2){
        if(arr[0] < arr[1]){
            return 1;
        }else {
            return -1;
        }
    }
    for (int i = 0; i<=(size-2)/2; i++) {
        if(arr[2*i+1] < arr[i]) return -1; 
        if(arr[2*i] < arr[i]) return -1;
    }
    return 1;
}

long int* strToInt(const char* chArr, int* counter){
    int j =  strlen(chArr);
    //int i = 0;
    *counter=0;
    //printf("dlength %d\n",j);
    long int* tmp = (long int*)calloc(j,sizeof(long)); 
    char* pEND;
    for(int i=0; i<j; i++){
        tmp[i] = strtol(chArr, &pEND, 10);
        //printf("%ld \n", dArr[i]);
        if(tmp[i] == 0) break;
        *counter = *counter+1;
        chArr = pEND; 
    }
    //printf("counter %d\n", *counter);
    long* dArr = (long*)calloc(*counter, sizeof(long));
    for(int i = 0; i < *counter; i++){
        dArr[i] = tmp[i];
    }
    free(tmp);
    return dArr;
}

void print_tree(const long* arr, int* size){
       for(int i=0; i<*size; i++){
           switch (i) {
                case 0:
                    printf("%ld\n",arr[i]);
                    continue;;
                case 1:
                    printf(" ");
                    printf("%ld\n",arr[i]);
                    continue;;
                case 2:
                    printf(" ");
                    printf("%ld\n",arr[i]);
                    continue;
                case 3:
                    printf("%ld\n",arr[i]);
                    continue;
                case 4:
                    printf(" ");
                    printf("%ld\n",arr[i]);
                    continue;
                case 5:
                    printf(" ");
                    printf("%ld\n",arr[i]);
                    break;
                case '6':
                    printf("%ld",arr[i]);
                    break;
                case '7':
                    printf("%ld",arr[i]);
                    break;
                case '8':
                    printf("%ld",arr[i]);
                    break;
                case '9':
                    printf("%ld",arr[i]);
                    break;
                 
           }
       }
    

}

int main(){
    char chArr[SIZE];
    int counter=0;
    int* counterPtr = &counter;
    while(1){
        char* r = fgets(chArr, SIZE, stdin);
        if(r == NULL){
            break;
        }
    }
    long int* dArr = strToInt(chArr, counterPtr);
    int heap = checkMinHeap(dArr, *counterPtr);
    if(heap == 1){
        printf("Je to taka kopa:\n");
        print_tree(dArr, counterPtr);
    }else {
        printf("Nie je kopa.\n");
    }
    free(dArr);
    return 0;
}