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ID题目提交者结果用时内存语言文件大小提交时间测评时间
#382439#7901. Basic Substring StructureEBeasonWA 36ms86964kbC++207.7kb2024-04-08 14:17:432024-04-08 14:17:43

Judging History

你现在查看的是最新测评结果

  • [2024-04-08 14:17:43]
  • 评测
  • 测评结果:WA
  • 用时:36ms
  • 内存:86964kb
  • [2024-04-08 14:17:43]
  • 提交

answer

#pragma GCC optimize(1, 2, 3, "Ofast", "inline")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned ll
// #define int ll
#define ls p << 1
#define rs p << 1 | 1
#define lowbit(x) ((x) & (-x))
#define endl '\n'
#define ld long double
#define MULTI_CASES
const int MaxN = 1e6 + 100;
const int INF = 1e9;
int T, N, M, K;
int ans[MaxN];
vector<int> a;
struct Sa {
	int sa[MaxN], rk[MaxN], oldrk[MaxN << 1], id[MaxN], key1[MaxN], cnt[MaxN], height[MaxN];
	int st[MaxN][25], logn[MaxN];
	int n;
	vector<int> s;
	void clear() {
		for (int i = 0; i <= n + 1; i++) {
			sa[i] = 0;
			rk[i] = 0;
			oldrk[i] = 0;
			cnt[i] = 0;
			key1[i] = 0;
			id[i] = 0;
			height[i] = 0;
		}
	}
	void init(int _n) {
		n = _n;
		for (int i = 0; i <= n + 1; i++) {
			sa[i] = 0;
			rk[i] = 0;
			oldrk[i] = 0;
			cnt[i] = 0;
			key1[i] = 0;
			id[i] = 0;
			height[i] = 0;
		}
		getsa();
		getheight();
	}
	bool cmp(int x, int y, int w) {
		return oldrk[x] == oldrk[y] && oldrk[x + w] == oldrk[y + w];
	}
	inline void getsa() {
		int i, m = n + 1, p, w;
		// sa[i]表示后缀排序第i小的编号
		// rk[i]表示后缀i的排名
		for (i = 1; i <= n; ++i) ++cnt[rk[i] = s[i]];
		for (i = 1; i <= m; ++i) cnt[i] += cnt[i - 1];
		for (i = n; i >= 1; --i) sa[cnt[rk[i]]--] = i;

		for (w = 1;; w <<= 1, m = p) { // m=p 就是优化计数排序值域
			for (p = 0, i = n; i > n - w; --i) id[++p] = i;
			for (i = 1; i <= n; ++i) 
				if (sa[i] > w) id[++p] = sa[i] - w;
			memset(cnt, 0, (m + 1) * sizeof(int));
			for (i = 1; i <= n; ++i) ++cnt[key1[i] = rk[id[i]]];
			// 注意这里px[i] != i,因为rk没有更新,是上一轮的排名数组

			for (i = 1; i <= m; ++i) cnt[i] += cnt[i - 1];
			for (i = n; i >= 1; --i) sa[cnt[key1[i]]--] = id[i];
			memcpy(oldrk + 1, rk + 1, n * sizeof(int));
			for (p = 0, i = 1; i <= n; ++i) rk[sa[i]] = cmp(sa[i], sa[i - 1], w) ? p : ++p;
			if (p == n) break;
		}
	}
	inline void getheight(){ 
		// height[i]=lcp(sa[i],sa[i-1])
		int i, k;
		for (i = 1, k = 0; i <= n; ++i) {
			if (rk[i] == 0) continue;
			if (k) --k;
			while (i + k <= n && s[i + k] == s[sa[rk[i] - 1] + k]) ++k;
			height[rk[i]] = k;
		}
	}
	inline void pre() {
		logn[0] = -1;
		int LogN = 20;
		for (int i = 1; i <= n; i++) logn[i] = logn[i / 2] + 1;
		for (int i = 1; i <= n; i++) st[i][0] = height[i];
		for (int j = 1; j <= LogN; j++) {
			int pj = 1 << (j - 1);
			for (int i = 1; i <= n; i++) {
				if (i + pj <= n)
					st[i][j] = min(st[i][j - 1], st[i + pj][j - 1]);
				else
					st[i][j] = st[i][j - 1];
			}
		}
	}
	inline int lcp(int l, int r) {
		if (l == r) return n - l + 1;
		l = rk[l];
		r = rk[r];
		if (l > r) swap(l, r);
		l++;
		int lp = r - l + 1;
		int n = 1 << logn[lp];
		return min(st[l][logn[lp]], st[r - n + 1][logn[lp]]);
	}
} SA;
struct Tt {
	ll a[MaxN];
	struct Point {
		ll sum, lan;
	} tree[MaxN << 2], ts;
	void js(int p, int x, int y, int z) {
		tree[p].sum += (y - x + 1) * z;
		tree[p].lan += z;
	}
	void pushdown(int p,int l, int r) {
		int mid = (l + r) >> 1;
		js(ls, l, mid, tree[p].lan);
		js(rs, mid + 1, r, tree[p].lan);
		tree[p].lan = 0;
	}
	inline Point pushup(Point L, Point R) {
		Point now = Point();
		now.sum = L.sum + R.sum;
		now.lan = 0;
		return now;
	}
	void build(int p, int l, int r) {
		tree[p].sum = tree[p].lan = 0;
		if (l == r) {
			tree[p].sum = a[l];
			tree[p].lan = 0;
			return;
		}
		pushdown(p, l, r);
		int mid = (l + r) >> 1;
		build(ls, l, mid);
		build(rs, mid + 1, r);
		tree[p] = pushup(tree[ls], tree[rs]);
	}
	void change(int p, int l, int r, int x, int y, int z) {
		if (x > y || l > N || r > N) return;
		if (l >= x && r <= y) {
			js(p, l, r, z);
			return;
		}
		pushdown(p, l, r);
		int mid = (l + r) >> 1;
		if (mid >= x) change(ls, l, mid, x, y, z);
		if (mid < y) change(rs, mid + 1, r ,x ,y, z);
		tree[p] = pushup(tree[ls], tree[rs]);
	}
	Point query(int p, int l, int r, int x, int y) {
		if (l >= x && r <= y) {
			return tree[p];
		}
		pushdown(p, l, r);
		int mid = (l + r) >> 1;
		if (mid >= x && mid < y) {
			return pushup(query(ls, l, mid, x, y), query(rs, mid + 1, r, x, y));
		}
		if (mid >= x) return query(ls, l, mid, x, y);
		if (mid < y) return query(rs, mid + 1, r, x, y);
		return Point();
	}
} TT;
ll g[MaxN], b[MaxN];
void updata(int l, int r, int k, int d) {
	if (l > r) return;
	TT.change(1, 1, N, l + 1, r, 1);
	TT.change(1, 1, N, l, l, k);
	TT.change(1, 1, N, r + 1, r + 1, -k - d * (r - l));
}
struct my_hash {
  static uint64_t splitmix64(uint64_t x) {
    x += 0x9e3779b97f4a7c15;
    x = (x ^ (x >> 30)) * 0xbf58476d1ce4e5b9;
    x = (x ^ (x >> 27)) * 0x94d049bb133111eb;
    return x ^ (x >> 31);
  }

  size_t operator()(uint64_t x) const {
    static const uint64_t FIXED_RANDOM =
        chrono::steady_clock::now().time_since_epoch().count();
    return splitmix64(x + FIXED_RANDOM);
  }
};
unordered_map<int ,ll, my_hash> mp[MaxN];
int js(int x, int y) {
	// if (a[x] == a[1]) return 0;
	int t = 1;
	if (y < N) {
		t += SA.lcp(x + 1, y + 1);
	}
	
	if (x + t >= y) {
		int len = y - x;
		t = len;
		if (x <= N && y + len <= N && a[x] == a[y + len]) {
			t += SA.lcp(x + len + 1, y + len + 1) + 1;
		}
		return t;
	} else { 
		return t;
	}
}
inline void Solve() {
	// Sa _;
	// SA = _;
	// Tt tttt;
	// TT = tttt;
	cin >> N;
	a.assign(N + 1, 0);
	for (int i = 1; i <= N; i++) {
		cin >> a[i];
		mp[i].clear();
	}
	SA.s = a;
	SA.init(N);
	SA.pre();
	for (int i = 1; i <= N; i++) {
		g[i] = SA.lcp(1, i);
		// cerr << g[i] << ' ';
	}
	int sum = 0;
	for (int i = 1; i <= N; i++) {
		sum += g[i];
		TT.a[i] = 0;
	}

	TT.a[1] = sum;
	for (int i = 0; i <= 4 * N; i++) {
		TT.tree[i].sum = 0;
		TT.tree[i].lan = 0;
	}
	TT.build(1, 1, N);
	for (int i = 1; i <= N; i++) {
		int l = 1, r = g[i];
		int x = i, y = x + g[i] - 1;
		if (i == 1) continue;
		if (r < x) {
			updata(l, r, -g[i], 1);
			updata(x, y, -g[i], 1);
		} else if (x <= r) {
			updata(l, x - 1, -g[i], 1);
			updata(x, y, -g[i], 1);
		}
		// for (int i = 1; i <= N; i++) {
		// 	b[i] = b[i - 1];
		// 	b[i] += TT.query(1, 1, N, i, i).sum;
		// 	cerr << b[i] << ' ';
		// } cerr << endl;
	}
	// updata(1, 2, -2, 1);
	for (int i = 1; i <= N; i++) {
		b[i] = b[i - 1];
		b[i] += TT.query(1, 1, N, i, i).sum;
		// cerr << b[i] << ' ';
	}
	// cerr << endl;
	for (int i = 1; i <= N; i++) {
		int x = g[i] + 1, y = i + g[i];
		if (y <= N && x <= N) {
			if (x >= i) {
				
			} else {
				if (y < N) mp[x][a[y]] += SA.lcp(x + 1, y + 1) + 1;
				else if (y == N) mp[x][a[y]] += 1;
			}
			
			mp[y][a[x]] += js(x, y);
			// cerr << x << ' ';
			// cerr << a[y] << ' ';
			// cerr << y << ' ';
			// cerr << a[x] << endl;
		}

	}
	ll jg = 0;
	for (int i = 1; i <= N; i++) {
		ans[i] = b[i];
		// int id = 0;
		for (auto it : mp[i]) {
			int ts = b[i] + it.second;
			if (it.first == a[i]) continue;
			if (ts > ans[i]) {
				ans[i] = ts;
				// id = it.first;
			}
			ans[i] = max(ans[i], ts);
			// cerr << i << ' ';
			// cerr << it.first << ' ';
			// cerr << it.second << endl;
		}
		jg += (1ll * ans[i]) ^ i;
		// cerr << id << ' ';
	}
	// cerr << endl;
	// for (int i = 1; i <= N; i++) {
	// 	cerr << b[i] << ' ';
	// } cerr << endl;
	// for (int i = 1; i <= N; i++) {
	// 	cerr << ans[i] << ' '; 
	// }
	// cerr << endl;
	cout << jg << endl;
}
signed main() {
	// ld be, ed;
	// be = clock();
	// freopen("1.in", "r", stdin);
	// freopen("1.out", "w", stdout);
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	cout.tie(nullptr);
	srand(time(NULL));
#ifdef MULTI_CASES
	int T;
	cin >> T;
	while (T--)
#endif
		Solve();
	// ed = clock();
	// cerr << (ed - be) / CLOCKS_PER_SEC << endl;
}

详细

Test #1:

score: 100
Accepted
time: 11ms
memory: 86964kb

input:

2
4
2 1 1 2
12
1 1 4 5 1 4 1 9 1 9 8 10

output:

15
217

result:

ok 2 lines

Test #2:

score: -100
Wrong Answer
time: 36ms
memory: 85940kb

input:

10000
8
2 1 2 1 1 1 2 2
9
2 2 1 2 1 2 1 2 1
15
2 1 2 1 1 1 1 2 2 1 2 1 2 2 1
2
1 1
10
2 1 1 1 2 2 1 1 2 2
3
2 1 2
11
1 2 2 1 1 2 1 2 2 1 1
14
2 1 1 1 1 2 1 1 1 2 2 1 2 1
12
2 2 2 1 2 2 2 1 1 2 1 2
4
2 1 1 2
8
1 2 2 2 1 2 1 1
8
1 1 2 1 2 1 1 1
6
2 1 1 1 2 2
14
2 2 1 1 1 1 2 2 2 1 2 2 1 1
10
1 2 2 1 1...

output:

94
128
347
3
211
14
265
318
267
15
95
109
67
349
215
3
335
364
377
344
3
19
122
65
15
83
48
258
11
63
35
171
114
103
252
213
21
53
343
66
102
19
16
68
324
362
270
309
313
299
326
366
231
332
3
302
54
330
3
61
32
147
387
46
338
90
246
3
165
346
245
20
155
3
404
393
392
81
268
360
20
54
25
288
3
17
35...

result:

wrong answer 6th lines differ - expected: '9', found: '14'