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  1. #include <bits/stdc++.h>
  2. using namespace std;
  3. const int MOD = 1e9 + 7;
  4. int n, k;
  5. int dp[2005][2005];
  6.  
  7. main() {
  8.     ios_base::sync_with_stdio(false);
  9.     cin.tie(0); cout.tie(0);
  10.     freopen("TEST.inp", "r", stdin);
  11.     freopen("TEST.out", "w", stdout);
  12.     cin >> n >> k;
  13.  
  14.     for (int i = 1; i <= n; i++) dp[1][i] = 1;
  15.     for (int i = 2; i <= k; i++) {
  16.         for (int j = 1; j <= n; j++) {
  17.             for (int id = j; id <= n; id += j) {
  18.                 dp[i][id] += dp[i - 1][j];
  19.                 if (dp[i][id] >= MOD) dp[i][id] -= MOD;
  20.             }
  21.         }
  22.     }
  23.     int ans = 0;
  24.     for (int i = 1; i <= n; i++) {
  25.         ans += dp[k][i];
  26.         if (ans >= MOD) ans -= MOD;
  27.     }
  28.  
  29.     cout << ans << '\n';
  30.  
  31.     return 0;
  32. }
  33.  
Success #stdin #stdout 0s 5312KB
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https://ideone.com/rlr3aG
language:
C++14 (gcc 8.3)
created:
15 hours ago
visibility:
public

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