#include <iostream>
using namespace std;
int main() {
int arr[1000][1000], n, m, count1 = 1, count2 = 1, result = 0;
cin >> n >> m;
for (int i = 0; i < n; i++)
for (int j = 0; j < m; j++)
arr[i][j] = count1++;
for (int j = 0; j < m; j++) {
for (int i = 0; i < n; i++) {
if(arr[i][j] == count2) result++;
count2++;
}
}
cout << result << "\n";
}
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