Submission #1308973

#	Time	Username	Problem	Language	Result	Execution time	Memory
1308973		aunn	A Huge Tower (CEOI10_tower)	C++20	35 / 100	73 ms	4668 KiB

tower

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vi = vector<int>;
using vll = vector<ll>;
#define sz(x) (int) (x).size()
using pi = pair<int,int>;

void setIO(string name = "") {
	cin.tie(0)->sync_with_stdio(0);
	if (sz(name)) {
		freopen((name + ".in").c_str(), "r", stdin);
		freopen((name + ".out").c_str(), "w", stdout);
	}
}
int MOD = 1e9+9;
int main() {
	setIO();
    int n, d;
    cin >> n >> d;
    vi arr;
    for(int i = 0; i < n; i++){
        int inp; cin >> inp;
        arr.push_back(inp);
    }
    sort(arr.begin(), arr.end());
    int ans = 1;
    for(int l = 0, r = 0; l < n; l++){
        while(r <= l && arr[r]+d < arr[l]){
            r++;
        }
        ans = ans * (l-r+1) % MOD;
    }
    cout << ans;
}

Compilation message (stderr)

tower.cpp: In function 'void setIO(std::string)':
tower.cpp:12:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |                 freopen((name + ".in").c_str(), "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tower.cpp:13:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |                 freopen((name + ".out").c_str(), "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 5 / 5
• Subtask 3: 5 / 5
• Subtask 4: 5 / 5
• Subtask 5: 0 / 5
• Subtask 6: 0 / 5
• Subtask 7: 0 / 5
• Subtask 8: 5 / 5
• Subtask 9: 0 / 5
• Subtask 10: 5 / 5
• Subtask 11: 5 / 5
• Subtask 12: 0 / 5
• Subtask 13: 0 / 5
• Subtask 14: 0 / 5
• Subtask 15: 0 / 5
• Subtask 16: 0 / 5
• Subtask 17: 0 / 5
• Subtask 18: 0 / 5
• Subtask 19: 0 / 5
• Subtask 20: 0 / 5