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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 | 99e2e923d0c77b02f3fb4ff648ea916954868606 (patch) | |
| tree | ec8e03f6f2cd1ce43990fb4fe6cd631967d0237e /store/works/solutions/acwing/2068.cpp | |
| parent | 1cee979f5d36b311a03cc7397a036ba11caf3d42 (diff) | |
| download | crupest-99e2e923d0c77b02f3fb4ff648ea916954868606.tar.gz crupest-99e2e923d0c77b02f3fb4ff648ea916954868606.tar.bz2 crupest-99e2e923d0c77b02f3fb4ff648ea916954868606.zip | |
chore(store): move everything to store.
Diffstat (limited to 'store/works/solutions/acwing/2068.cpp')
| -rw-r--r-- | store/works/solutions/acwing/2068.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/store/works/solutions/acwing/2068.cpp b/store/works/solutions/acwing/2068.cpp new file mode 100644 index 0000000..592f43f --- /dev/null +++ b/store/works/solutions/acwing/2068.cpp @@ -0,0 +1,57 @@ +#include <algorithm>
+#include <cmath>
+#include <cstring>
+#include <iostream>
+
+int n, K;
+int A[100010];
+int c[11][100010];
+long long result;
+
+int CalcDigitCount(int n) {
+ int c = 0;
+ while (n != 0) {
+ c++;
+ n /= 10;
+ }
+ return c;
+}
+
+void work() {
+ for (int i = 0; i < n; i++) {
+ result += c[CalcDigitCount(A[i])][(K - A[i] % K) % K];
+ // Wrong Code I don't know why!
+ // int a = A[i];
+ // for (int j = 1; j < 11; j++) {
+ // a *= 10;
+ // a %= K;
+ // c[j][a]++;
+ // }
+ for (int j = 0, power = 1; j < 11; j++) {
+ c[j][power * 1ll * A[i] % K]++;
+ power = power * 10 % K;
+ }
+ }
+}
+
+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];
+ }
+
+ work();
+
+ std::reverse(A, A + n);
+ std::memset(c, 0, sizeof c);
+
+ work();
+
+ std::cout << result;
+
+ return 0;
+}
|