#include <iostream>
#include <iomanip>
#include <cmath>

using namespace std;

void out(int* a, int N, int w = 5)
{
    int m = ceil((sqrt(1+8*N)-1)/2);
    for(int n = 0, row = 1;n < N;++row)
    {
        for(int i = 0; i < (m-row)*w/2; ++i) cout << " ";
        for(int i = 0; i < row && n < N; ++i) cout << setw(w) << left << a[n++];
        cout << endl;
    }
}

int main(int argc, char * argv[])
{
    int a[70];
    for(int i = 0; i < 70; ++i) a[i] = rand()%100;
    out(a,70);
}