結果

問題 No.1863 Xor Sum 2...?
ユーザー Forested
提出日時 2022-03-04 22:00:58
言語 C++17
(gcc 13.3.0 + boost 1.87.0)
結果
AC  
実行時間 46 ms / 2,000 ms
コード長 3,205 bytes
コンパイル時間 1,468 ms
コンパイル使用メモリ 118,856 KB
最終ジャッジ日時 2025-01-28 05:18:31
ジャッジサーバーID
(参考情報)
judge5 / judge3
このコードへのチャレンジ
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ファイルパターン 結果
sample AC * 3
other AC * 28
権限があれば一括ダウンロードができます

ソースコード

diff #
プレゼンテーションモードにする

// ===== template.hpp =====
#include <algorithm>
#include <array>
#include <bitset>
#include <cassert>
#include <cmath>
#include <iomanip>
#include <iostream>
#include <map>
#include <numeric>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <tuple>
#include <unordered_map>
#include <unordered_set>
#include <utility>
#include <vector>
#define OVERRIDE(a, b, c, d, ...) d
#define REP2(i, n) for (i32 i = 0; i < (i32) (n); ++i)
#define REP3(i, m, n) for (i32 i = (i32) (m); i < (i32) (n); ++i)
#define REP(...) OVERRIDE(__VA_ARGS__, REP3, REP2)(__VA_ARGS__)
#define PER(i, n) for (i32 i = (i32) (n) - 1; i >= 0; --i)
#define ALL(x) begin(x), end(x)
using namespace std;
using u32 = unsigned int;
using u64 = unsigned long long;
using u128 = __uint128_t;
using i32 = signed int;
using i64 = signed long long;
using i128 = __int128_t;
template <typename T>
using Vec = vector<T>;
template <typename T>
bool chmin(T &x, const T &y) {
if (x > y) {
x = y;
return true;
}
return false;
}
template <typename T>
bool chmax(T &x, const T &y) {
if (x < y) {
x = y;
return true;
}
return false;
}
[[maybe_unused]] constexpr i32 inf = 1000000100;
[[maybe_unused]] constexpr i64 inf64 = 3000000000000000100;
struct SetIO {
SetIO() {
ios::sync_with_stdio(false);
cin.tie(nullptr);
cout << fixed << setprecision(10);
}
} set_io;
// ===== template.hpp =====
#ifdef DEBUGF
#include "../new_library/other/debug.hpp"
#else
#define DBG(x) (void) 0
#endif
int main() {
i32 n;
cin >> n;
Vec<i64> a(n), b(n);
REP(i, n) {
cin >> a[i];
}
REP(i, n) {
cin >> b[i];
}
Vec<i64> asum(n + 1, 0);
REP(i, n) {
asum[i + 1] = asum[i] + a[i];
}
Vec<i64> axor(n + 1, 0);
REP(i, n) {
axor[i + 1] = axor[i] ^ a[i];
}
Vec<i64> bxor(n + 1, 0);
REP(i, n) {
bxor[i + 1] = bxor[i] ^ b[i];
}
Vec<i64> bxorsum(n + 2, 0);
REP(i, n + 1) {
bxorsum[i + 1] = bxorsum[i] + bxor[i];
}
auto range_b_count = [&](i64 x, i32 l, i32 r) -> i64 {
if (x == 1) {
return bxorsum[r] - bxorsum[l];
} else {
return r - l - (bxorsum[r] - bxorsum[l]);
}
};
i64 ans = 0;
REP(i, n) {
// max r s.t. sum([l, r)) - xor([l, r)) = 0
i32 ok = i, ng = n + 1;
while (ng - ok > 1) {
i32 mid = (ok + ng) / 2;
if (asum[mid] - asum[i] == (axor[mid] ^ axor[i])) {
ok = mid;
} else {
ng = mid;
}
}
i32 max_r0 = ok;
// max r s.t. sum([l, r)) - xor([l, r)) = 1
ng = n + 1;
while (ng - ok > 1) {
i32 mid = (ok + ng) / 2;
if (asum[mid] - asum[i] == (axor[mid] ^ axor[i]) + 1) {
ok = mid;
} else {
ng = mid;
}
}
i32 max_r1 = ok;
DBG(max_r0);
DBG(max_r1);
ans += range_b_count(bxor[i], i + 1, max_r0 + 1);
ans += range_b_count(!bxor[i], max_r0 + 1, max_r1 + 1);
}
cout << ans << '\n';
}
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