USACO Raucous Rockers

Code

/*
 ID: wcr19961
 PROG: rockers
 LANG: C++11
*/
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cstdlib>
using namespace std;

const int maxn = 25;
int dp[maxn][maxn];

int main() {
  freopen("rockers.in", "r", stdin);
  freopen("rockers.out", "w", stdout);
  int n, t, m;
  scanf("%d%d%d", &n, &t, &m);
  for (int i = 1; i <= n; ++i) {
    int x;
    scanf("%d", &x);
    for (int j = m; j >= 1; --j) {
      for (int k = 0; k <= t; ++k) {
        if (k < x) {
          if (t >= x && j < m) {
            dp[j + 1][t - x] = max(dp[j + 1][t - x], dp[j][k] + 1);
          }
        } else {
          dp[j][k - x] = max(dp[j][k - x], dp[j][k] + 1);
        }
      }
    }
  }
  int ans = 0;
  for (int i = 1; i <= m; ++i) {
    for (int j = 0; j < t; ++j) {
      ans = max(ans, dp[i][j]);
    }
  }
  printf("%d\n", ans);
  return 0;
}