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Submission #347406

# Submission time Handle Problem Language Result Execution time Memory
347406 2021-01-12T23:27:07 Z danielsuh A Huge Tower (CEOI10_tower) C++17
100 / 100
 140 ms 16124 KB 
#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

#define mpa make_pair
#define pb push_back
#define ins insert
#define f first
#define s second
#define all(x) x.begin(), x.end()
#define nl "\n"
#define int ll

const int inf = numeric_limits<int>::max();

void fileIO(string filename) {
	freopen((filename + ".in").c_str(), "r", stdin);
	freopen((filename + ".out").c_str(), "w", stdout);
}

const ll MOD = 1e9 + 9;

void solve() {
	int n, d;
	cin >> n >> d;
	vector<int> a(n, 0);
	for(int i = 0; i < n; i++) {
		cin >> a[i];
	}
	sort(all(a), greater<>());
	vector<int> mult(n, 1);
	int r = 0;
	for(int l = 0; l < n; l++) {
		while(r < n && a[l] - a[r] <= d) {
			r++;
		}
		mult[l] = r - l;
	}
	int ans = 1;
	for(int i = n - 1; i >= 0; i--) {
		ans *= mult[i] % MOD;
		ans %= MOD;
	}
	cout << ans % MOD;
}

signed main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);
	//fileIO("");
	
	int tc = 1;
	//cin >> tc;

	for(int i = 1; i <= tc; i++) {
		solve();
	}
}

Compilation message

tower.cpp: In function 'void fileIO(std::string)':
tower.cpp:20:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   20 |  freopen((filename + ".in").c_str(), "r", stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
tower.cpp:21:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   21 |  freopen((filename + ".out").c_str(), "w", stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #2
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #3
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #4
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #5
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #6
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #7
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #8
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #9
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #10
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #11
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #12
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #13
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #14
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 380 KB Output is correct

Subtask #15
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #16
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct

Subtask #17
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 620 KB Output is correct

Subtask #18
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 1644 KB Output is correct
2 Correct 11 ms 1644 KB Output is correct

Subtask #19
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 6764 KB Output is correct
2 Correct 54 ms 6764 KB Output is correct

Subtask #20
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 16124 KB Output is correct
2 Correct 140 ms 15468 KB Output is correct