#include <bits/stdc++.h>
using namespace std;
int n, m;
int Calculate_power(int j) {
int answer = 1;
for (int i = 1 ; i <= m ; i ++)
answer *= j;
return answer;
}
void Mi_and(int n) {
int answer = 0;
for (int i = 1 ; i <= n ; i ++){
answer += Calculate_power(i);
}
printf("%d\n", answer);
}
int main() {
scanf("%d%d", &n, &m);
Mi_and(n);
return 0;
}
1≤n≤1001≤n≤100,1≤m≤4
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