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| author | Yuqian Yang <crupest@crupest.life> | 2025-02-28 23:13:39 +0800 |
|---|---|---|
| committer | Yuqian Yang <crupest@crupest.life> | 2025-02-28 23:13:39 +0800 |
| commit | dc1f0c4c0096013799416664894c5194dc7e1f52 (patch) | |
| tree | 2f5d235f778cd720f4c39ec3e56b77ba6d99f375 /store/works/solutions/acwing/1239.cpp | |
| parent | 7299d424d90b1effb6db69e3476ddd5af72eeba4 (diff) | |
| download | crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.tar.gz crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.tar.bz2 crupest-dc1f0c4c0096013799416664894c5194dc7e1f52.zip | |
chore(store): move everything to store.
Diffstat (limited to 'store/works/solutions/acwing/1239.cpp')
| -rw-r--r-- | store/works/solutions/acwing/1239.cpp | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/store/works/solutions/acwing/1239.cpp b/store/works/solutions/acwing/1239.cpp new file mode 100644 index 0000000..c670cd4 --- /dev/null +++ b/store/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;
+}
|