結果
問題 | No.1209 XOR Into You |
ユーザー | minato |
提出日時 | 2020-09-03 11:30:21 |
言語 | C++17(gcc12) (gcc 12.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 345 ms / 2,000 ms |
コード長 | 4,380 bytes |
コンパイル時間 | 16,783 ms |
コンパイル使用メモリ | 287,780 KB |
最終ジャッジ日時 | 2025-01-14 04:07:12 |
ジャッジサーバーID (参考情報) |
judge3 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 4 |
other | AC * 37 |
ソースコード
#pragma GCC target("avx2,avx") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #include <bits/stdc++.h> using namespace std; //#include <ext/pb_ds/assoc_container.hpp> //#include <ext/pb_ds/tree_policy.hpp> //using namespace __gnu_pbds; //using i128 = __int128_t; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pll = pair<long long, long long>; #define rep(i, n) for(int i = 0; i < (n); ++i) #define all(x) (x).begin(),(x).end() #define SZ(x) ((int)(x).size()) constexpr char ln = '\n'; template<class T1, class T2> inline bool chmax(T1 &a, T2 b) {if (a < b) {a = b; return true;} return false;} template<class T1, class T2> inline bool chmin(T1 &a, T2 b) {if (a > b) {a = b; return true;} return false;} inline int topbit(int x) {return x == 0 ? -1 : 31-__builtin_clz(x);} inline int topbit(long long x) {return x == 0 ? -1 : 63-__builtin_clzll(x);} inline int botbit(int x) {return x == 0 ? 32 : __builtin_ctz(x);} inline int botbit(long long x) {return x == 0 ? 64 : __builtin_ctzll(x);} inline int popcount(int x) {return __builtin_popcount(x);} inline int popcount(long long x) {return __builtin_popcountll(x);} inline void print() {cout << "\n";} template<class T> inline void print(const vector<T> &v) { for (auto itr = v.begin(); itr != v.end(); ++itr) cout << *itr << " "; print(); } template<class T, class... Args> inline void print(const T &x, const Args &... args) { cout << x << " "; print(args...); } #ifdef MINATO_LOCAL #define dump(x) cerr << __LINE__ << " : " << #x << " = " << (x) << endl; inline void debug() {cerr << endl;} template<class T> inline void debug(const vector<T> &v) { for (auto itr = v.begin(); itr != v.end(); ++itr) cerr << *itr << " "; debug(); } template<class T, class... Args> inline void debug(const T &x, const Args &... args) { cerr << x << " "; debug(args...); } #else #define dump(x) void(0) inline void debug() {} template<class T> inline void debug(const vector<T> &v) {} template<class T, class... Args> inline void debug(const T &x, const Args &... args) {} #endif struct Fast_ios {Fast_ios() {cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20);};} fast_ios; //////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// template<typename T> struct BinaryIndexedTree { int N; vector<T> data; BinaryIndexedTree(){} BinaryIndexedTree(int N) : N(N), data(N+1,0) {} // [0,k) (0-indexed) a[0] + … + a[k-1] T sum(int k) { T ret = 0; for(; k > 0; k -= k & -k) ret += data[k]; return ret; } // [l,r) (0-indexed) a[l] + … + a[r-1] T sum(int l, int r) { if (l >= r) return 0; T vl = sum(l); T vr = sum(r); return vr - vl; } // (0-indexed) a[k] += x; void add(int k, T x) { for(++k; k <= N; k += k & -k) data[k] += x; } // (0-indexed) int lowerbound(T x) { int k = 1; int ret = 0; while ((k<<1) <= N) k <<= 1; while (k) { if (ret + k <= N && data[ret+k] < x) { x -= data[ret+k]; ret += k; } k >>= 1; } return ret; } // (0-indexed) int upperbound(T x) {return lowerbound(x+1);} }; int main() { int N; cin >> N; vector<int> A(N),B(N); rep(i,N) cin >> A[i]; rep(i,N) cin >> B[i]; auto C = A; multiset<int> dic; dic.emplace(C[0]); for (int i = 1; i < N; i++) { C[i] = A[i-1]^A[i]; dic.emplace(C[i]); } vector<int> D(N); if (A[0]!=B[0]) { cout << -1 << ln; return 0; } D[0] = C[0]; int tmp = C[0]; for (int i = 1; i < N; i++) { int val = B[i]^tmp; if (dic.find(val)==dic.end()) { cout << -1 << ln; return 0; } D[i] = val; tmp ^= val; dic.erase(dic.find(val)); } map<int, vector<int>> mp; for (int i = N-1; i >= 0; i--) { mp[C[i]].emplace_back(i); } vector<int> E(N); rep(i,N) { E[i] = mp[D[i]].back(); mp[D[i]].pop_back(); } BinaryIndexedTree<int> BIT(N); ll ans = 0; rep(i,N) { ans += BIT.sum(E[i],N); BIT.add(E[i],1); } cout << ans << ln; }