import java.util.Arrays;
import java.util.Scanner;

/**
 * yukicoder no.31
 * @author scache
 *
 */
public class Main {
	public static void main(String[] args) {
		Main p = new Main();
	}

	public Main() {
		Scanner sc = new Scanner(System.in);
		
		int n = sc.nextInt();
		long v = sc.nextLong();
		long[] c = new long[n];
		for(int i=0;i<n;i++)
			c[i] = sc.nextLong();
		solve(v, c);
	}

	public void solve(long v, long[] c) {
		
		long[] liter = new long[c.length];
		Arrays.fill(liter, 1);
		liter[0] = Math.max(v-c.length+1, 1);
		
		long[] costSum = new long[c.length];
		costSum[0] = c[0];
		for(int i=1;i<c.length;i++)
			costSum[i] = costSum[i-1]+c[i];
		
		boolean isChanged = true;
		while(isChanged){
			isChanged = false;
			for(int i=0;i<c.length;i++){
				long curTotal = liter[i]; 
				long curCost = c[i] * liter[i];
				for(int j=i+1;j<c.length;j++){
					curTotal += liter[j];
					curCost += c[j]*liter[j];
					
					if(curCost > c[i]*(curTotal%(j-i+1)) + costSum[j]*(curTotal/(j-i+1))){
						liter[i] = curTotal%(j-i+1)+curTotal/(j-i+1);
						Arrays.fill(liter, i+1, j+1, curTotal/(j-i+1));
						isChanged = true;
						curCost = c[i]*(curTotal%(j-i+1)) + costSum[j]*(curTotal/(j-i+1));
//						System.out.println(Arrays.toString(liter));
//						break;
					}
				}
//				if(isChanged)
//					break;
			}
			
		}
		
		long res = 0;
		for(int i=0;i<c.length;i++)
			res += c[i] * liter[i];
		
		System.out.println(res);
	}

}