# | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
---|---|---|---|---|---|---|---|
1115581 | 2024-11-20T16:21:20 Z | vjudge1 | Rice Hub (IOI11_ricehub) | C++14 | 0 ms | 0 KB |
#include <iostream> #include <vector> using namespace std; typedef long long ll; int R; ll L, B; vector<ll> X; vector<ll> prefixSum; bool check(int K) { int N = R; for (int i = 0; i <= N - K; ++i) { int j = i + K - 1; int m = (i + j) / 2; int leftCount = m - i; ll sumLeft = (leftCount > 0 ? prefixSum[m - 1] - (i > 0 ? prefixSum[i - 1] : 0) : 0); int rightCount = j - m; ll sumRight = (rightCount > 0 ? prefixSum[j] - prefixSum[m] : 0); ll totalCost = X[m] * (ll)leftCount - sumLeft + sumRight - X[m] * (ll)rightCount; if (totalCost <= B) { return true; } } return false; } int main() { cin >> R >> L >> B; X.resize(R); for (int i = 0; i < R; ++i) { cin >> X[i]; } prefixSum.resize(R); prefixSum[0] = X[0]; for (int i = 1; i < R; ++i) { prefixSum[i] = prefixSum[i - 1] + X[i]; } int low = 1, high = R; int ans = 0; while (low <= high) { int mid = (low + high) / 2; if (check(mid)) { ans = mid; low = mid + 1; } else { high = mid - 1; } } cout << ans << endl; return 0; }