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| author | Yuqian Yang <crupest@crupest.life> | 2025-02-12 15:55:21 +0800 |
|---|---|---|
| committer | Yuqian Yang <crupest@crupest.life> | 2025-02-12 16:04:50 +0800 |
| commit | 77e6cdc863d2cbd9df578a665804daf28d8593fe (patch) | |
| tree | 62c9f3e071d8d1d6fe125fe801907db11784332e /works/solutions/acwing/1239.cpp | |
| parent | 10eb95869601e145b1d8bc909424777c25752d51 (diff) | |
| parent | a557fa36a22c5ef4a29da596ee1e3aa10be55984 (diff) | |
| download | crupest-77e6cdc863d2cbd9df578a665804daf28d8593fe.tar.gz crupest-77e6cdc863d2cbd9df578a665804daf28d8593fe.tar.bz2 crupest-77e6cdc863d2cbd9df578a665804daf28d8593fe.zip | |
import(solutions): IMPORT crupest/solutions COMPLETE.
Diffstat (limited to 'works/solutions/acwing/1239.cpp')
| -rw-r--r-- | works/solutions/acwing/1239.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/works/solutions/acwing/1239.cpp b/works/solutions/acwing/1239.cpp new file mode 100644 index 0000000..c670cd4 --- /dev/null +++ b/works/solutions/acwing/1239.cpp @@ -0,0 +1,52 @@ +#include <algorithm>
+#include <iostream>
+
+int N, K;
+long long A[100010];
+
+long long M = 1000000009;
+
+int main() {
+ std::ios_base::sync_with_stdio(false);
+ std::cin.tie(nullptr);
+
+ std::cin >> N >> K;
+
+ for (int i = 0; i < N; i++) {
+ std::cin >> A[i];
+ }
+
+ std::sort(A, A + N);
+
+ long long result = 1;
+ int left = 0, right = N - 1;
+ long long sign = 1;
+ int k = K;
+
+ if (k % 2) {
+ result = A[N - 1];
+ right--;
+ k--;
+
+ if (result < 0) {
+ sign = -1;
+ }
+ }
+
+ while (k) {
+ long long x = A[left] * A[left + 1], y = A[right] * A[right - 1];
+
+ if (x * sign > y * sign) {
+ result = x % M * result % M;
+ left += 2;
+ } else {
+ result = y % M * result % M;
+ right -= 2;
+ }
+ k -= 2;
+ }
+
+ std::cout << result;
+
+ return 0;
+}
|