Numerical_valleys.cpp

#include <iostream>

using namespace std;

int number_of_digits(int n) {
	if(n < 10)
		return 1;
	return 1 + number_of_digits(n / 10);
}

int max_size(int n, int r) {
	// digits * rows, slashes, dot
	return number_of_digits(n) * (r * 2) + (r * 2 - 2) + 1;
}

int main() {
	int n, r;
	cin >> n >> r;
	int digits = number_of_digits(n);
	int size = max_size(n, r);
	for(int i = 1; i <= r; i++) {
		int num_print = i * 2;
		int half_print = num_print / 2;
		int slashes = num_print - 2;
		int dot_count = size - slashes - (num_print * digits);
		for(int j = 0; j < half_print; j++) {
			cout << n;
			if(slashes > 0 && (half_print - j - 1) != 0) {
				cout << "-";
				--slashes;
			}
		}
		for(int j = 0; j < dot_count; j++) {
			cout << ".";
		}
		for(int j = 0; j < half_print; j++) {
			cout << n;
			if(slashes > 0 && (half_print - j - 1) != 0) {
				cout << "-";
				--slashes;
			}
		}
		cout << endl;
	}
}