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QOJ

IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#308240#6567. Repetitive String InventionMizara#WA 73ms6140kbC++172.9kb2024-01-19 19:30:582024-01-19 19:30:59

Judging History

你现在查看的是最新测评结果

  • [2024-01-19 19:30:59]
  • 评测
  • 测评结果:WA
  • 用时:73ms
  • 内存:6140kb
  • [2024-01-19 19:30:58]
  • 提交

answer

#include <iostream>
#include <algorithm>
#include <vector>
#include <string>
#include <map>
#include <queue>
#include <set>
#include <math.h>
#include <utility>
const int OO = 0;
const int md = 998244353;
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef vector<int> vi;
typedef vector<iii> viii;

const int N = 808;

int r[N][N], l[N][N];

int n;
string s;

int PS[N], kmp[N];

void do_kmp(int i, int j) {
	int len = j - i + 1;
	kmp[0] = 0;
	for (int ind = 1; ind < len; ind++) {
		kmp[ind] = kmp[ind - 1] + 1; // candidate
		while (kmp[ind] > 1 && s[i + kmp[ind] - 1] != s[i + ind])
			kmp[ind] = kmp[kmp[ind] - 1] + 1;
		if (s[i + kmp[ind] - 1] != s[i + ind])
			kmp[ind] = 0;
	}
	for (int i = 0; i <= len; i++) PS[i] = 0;
	int suflen = kmp[len - 1];
	while (suflen > 0) {
		if (2 * suflen < len) {
			PS[(len - 2 * suflen + 1) / 2] += 2;
		}
		suflen = kmp[suflen - 1];
	}
	PS[(len + 1) / 2]++;
	for (int i = 1; i <= len; i++) PS[i] += PS[i - 1];
}

int calc_odd(int st, int en) {
	int c = (st + en) / 2;
	int cl, cr;
	int ans = 0;
	for (int i = 0; i < st; i++) {
		cr = min(r[i][c], st - i + 1);
		cl = l[i][c];
		cl = min(cl, en - st + 1);
		ans += PS[min(cl, cr)];
	}
	for (int i = en + 1; i < n; i++) {
		cr = r[i][c];
		cl = min(l[i][c], i - en + 1);
		cl = min(cl, en - st + 1);
		ans += PS[min(cl, cr)];
	}
	return ans;
}
int calc_even(int st, int en) {
	int c = (st + en) / 2;
	int cl, cr;
	int ans = 0;
	for (int i = 0; i < st - 1; i++) {
		cr = min(r[i + 1][c + 1], st - i + 1);
		cl = l[i][c];
		cl = min(cl, en - st + 1);
		ans += PS[min(cl, cr)];
	}
	for (int i = en + 1; i < n - 1; i++) {
		cr = r[i + 1][c + 1];
		cl = min(l[i][c], i - en + 1);
		cl = min(cl, en - st + 1);
		ans += PS[min(cl, cr)];
	}
	return ans;
}
int calc(int st, int en) {
	do_kmp(st, en);
	if ((en - st + 1) % 2 == 1) return calc_odd(st, en);
	return calc_even(st, en);
}

void solve() {
	cin >> s;
	n = s.size();
	for (int i = 0; i < n; i++) for (int j = i + 1; j < n; j++) {
		if (i >= 1)
			r[i][j] = max(0, r[i - 1][j - 1] - 1);
		while (i + r[i][j] < n && j + r[i][j] < n && s[i + r[i][j]] == s[j + r[i][j]]) r[i][j]++;
		r[j][i] = r[i][j];
	}
	// l
	for (int i = n - 1; i >= 0; i--) for (int j = i - 1; j >= 0; j--) {
		if (i < n - 1)
			l[i][j] = max(0, l[i + 1][j + 1] - 1);
		while (i - l[i][j] >= 0 && j - l[i][j] >= 0 && s[i - l[i][j]] == s[j - l[i][j]]) l[i][j]++;
		l[j][i] = l[i][j];
	}
	ll ans = 0;
	for (int st = 0; st < n; st++) for (int en = st; en < n; en++) {
		int tmp = calc(st, en);
		if (OO) {
			cout << "calc(" << st << ", " << en << "): " << tmp << endl;
		}
		ans += tmp;
	}
	cout << ans / 2 << endl;
}

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	int tests = 1;
	//cin >> tests;
	while (tests--) solve();
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 3636kb

input:

aaaa

output:

9

result:

ok single line: '9'

Test #2:

score: 0
Accepted
time: 0ms
memory: 3668kb

input:

axabxbcxcdxd

output:

22

result:

ok single line: '22'

Test #3:

score: -100
Wrong Answer
time: 73ms
memory: 6140kb

input:

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...

output:

542485441

result:

wrong answer 1st lines differ - expected: '536006700', found: '542485441'