Submission #1262411

#	Time	Username	Problem	Language	Result	Execution time	Memory
1262411		tkhoi13	A Huge Tower (CEOI10_tower)	C++20	100 / 100	78 ms	5188 KiB

tower

#include <bits/stdc++.h>
#define ll long long
#define db double
#define pii pair<int, int>
#define fi first
#define se second
#define pb push_back
#define all(x) begin(x), end(x)
#define allr(x) rbegin(x), rend(x)
#define szx(x) ((int)(x).size())
#define FOR(i, a, b) for (int i = a, _b = (b); i <= _b; ++i)
#define ROF(i, a, b) for (int i = a, _b = (b); i >= _b; --i)
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define endl '\n'
#define inf 1000000007
#define mod 1000000007

using namespace std;

void setIO(string filename = "") {
    ios::sync_with_stdio(0);
    cin.tie(0);
    if (!filename.empty()) {
        if (ifstream(filename + ".in")) {
            freopen((filename + ".in").c_str(), "r", stdin);
            freopen((filename + ".out").c_str(), "w", stdout);
        }
    }
}

ll mul(ll a, ll b) {
#define mod 1000000009;

    return (a * b) % mod;
}

void solve() {
    int n, d;
    cin >> n >> d;
    ll a[n];
    for (ll& i : a) cin >> i;
    sort(a, a + n);

    ll ans = 1;

    for (int l = 0, r = 0; l < n; l++) {
        while (r < n - 1 && -a[l] + a[r + 1] <= d) r++;
        int dis = r - l + 1;

        ans = mul(ans, dis);
    }

    cout << ans;
}

int main() {
    setIO("sabotage");
    int t = 1;
    // cin >> t;
    while (t--) solve();
}

Compilation message (stderr)

tower.cpp:32: warning: "mod" redefined
   32 | #define mod 1000000009;
      | 
tower.cpp:16: note: this is the location of the previous definition
   16 | #define mod 1000000007
      | 
tower.cpp: In function 'void setIO(std::string)':
tower.cpp:25:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |             freopen((filename + ".in").c_str(), "r", stdin);
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tower.cpp:26:20: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |             freopen((filename + ".out").c_str(), "w", stdout);
      |             ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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