func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 2e5 + 100;   int n, h, l, r, dp[2222][2222], a[2222];   int main() {     ios_base::sync_with_stdio(false);     cin >> n >> h >> l >> r;     for (int i = 0; i < n; i++) cin >> a[i];     for (int i = 0; i < h; i++)       for (int j = 0; j <= n; j++) dp[j][i] = -1e9;     dp[0][0] = 0;     for (int i = 0; i < n; i++) {       for (int j = 0; j < h; j++) {         int x = j + a[i];         if (x >= h) x -= h;         dp[i + 1][x] = max(dp[i + 1][x], dp[i][j] + (l <= x && x <= r));         int y = j + a[i] - 1;         if (y >= h) y -= h;         dp[i + 1][y] = max(dp[i + 1][y], dp[i][j] + (l <= y && y <= r));       }     }     cout << *max_element(dp[n], dp[n] + h);     cerr <<   nTime elapsed:   << 1.0 * clock() / CLOCKS_PER_SEC <<   s. n ;     return 0;   }   