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| author | crupest <crupest@outlook.com> | 2021-03-12 16:03:10 +0800 |
|---|---|---|
| committer | crupest <crupest@outlook.com> | 2021-03-12 16:03:10 +0800 |
| commit | 1025e3d0f3fcf3aff2c8e5cad857f0f04ab40f15 (patch) | |
| tree | b4791794726e0808b976f6981858f63f4cda15a5 /acwing/1236.cpp | |
| parent | 076e1e5a61d0455733b9417978813e3203758fd8 (diff) | |
| download | solutions-1025e3d0f3fcf3aff2c8e5cad857f0f04ab40f15.tar.gz solutions-1025e3d0f3fcf3aff2c8e5cad857f0f04ab40f15.tar.bz2 solutions-1025e3d0f3fcf3aff2c8e5cad857f0f04ab40f15.zip | |
Add acwing 1236.
Diffstat (limited to 'acwing/1236.cpp')
| -rw-r--r-- | acwing/1236.cpp | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/acwing/1236.cpp b/acwing/1236.cpp new file mode 100644 index 0000000..a89a890 --- /dev/null +++ b/acwing/1236.cpp @@ -0,0 +1,54 @@ +#include <iostream>
+
+const int MAX = 100000;
+const int MM = 100010;
+
+int N;
+
+long long ca[MM];
+long long cb[MM];
+
+int main() {
+ std::ios_base::sync_with_stdio(false);
+ std::cin.tie(nullptr);
+
+ std::cin >> N;
+
+ for (int i = 0; i < N; i++) {
+ int a;
+ std::cin >> a;
+ ca[a]++;
+ }
+
+ for (int n = 1; n <= MAX; n++) {
+ ca[n] = ca[n - 1] + ca[n];
+ }
+
+ for (int i = 0; i < N; i++) {
+ int b;
+ std::cin >> b;
+ cb[b]++;
+ }
+
+ for (int n = 1; n <= MAX; n++) {
+ cb[n] *= ca[n - 1];
+ }
+
+ for (int n = 2; n <= MAX; n++) {
+ cb[n] = cb[n - 1] + cb[n];
+ }
+
+ long long result = 0;
+
+ for (int i = 0; i < N; i++) {
+ int c;
+ std::cin >> c;
+ if (c >= 2) {
+ result += cb[c - 1];
+ }
+ }
+
+ std::cout << result;
+
+ return 0;
+}
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