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2460. [BeiJing2011] 元素

https://hydro.ac/d/bzoj/record/6322f07e32ae6c3198cca121
This commit is contained in:
Baoshuo Ren 2022-09-15 17:29:47 +08:00
parent 4ba381064b
commit 273f8ac7ff
Signed by: baoshuo
GPG Key ID: 00CB9680AB29F51A
21 changed files with 112 additions and 0 deletions

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#include <iostream>
#include <algorithm>
#include <functional>
using std::cin;
using std::cout;
const char endl = '\n';
const int N = 1005;
int n, ans;
std::pair<int, unsigned long long> a[N];
unsigned long long p[N];
inline bool insert(unsigned long long x) {
for (int i = 0; i <= 61; i++) {
if (x & (1ull << i)) {
if (p[i]) {
x ^= p[i];
} else {
p[i] = x;
return true;
}
}
}
return false;
}
int main() {
std::ios::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n;
for (int i = 1; i <= n; i++) {
cin >> a[i].second >> a[i].first;
}
std::sort(a + 1, a + 1 + n, std::greater<std::pair<int, unsigned long long>>());
for (int i = 1; i <= n; i++) {
if (insert(a[i].second)) {
ans += a[i].first;
}
}
cout << ans << endl;
return 0;
}

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