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IDProblemSubmitterResultTimeMemoryLanguageFile sizeSubmit timeJudge time
#122776#6567. Repetitive String Inventioncada_dia_mas_insanosWA 389ms3420kbC++172.7kb2023-07-11 03:14:332023-07-11 03:14:36

Judging History

你现在查看的是最新测评结果

  • [2023-08-10 23:21:45]
  • System Update: QOJ starts to keep a history of the judgings of all the submissions.
  • [2023-07-11 03:14:36]
  • 评测
  • 测评结果:WA
  • 用时:389ms
  • 内存:3420kb
  • [2023-07-11 03:14:33]
  • 提交

answer

// Too many mind, no mind.
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
#include <array>
#include <iomanip>

using namespace std;

#define mp make_pair
#define fi first
#define se second
#define pb push_back
#define ALL(x) (x).begin(), (x).end()
#define RALL(x) (x).rbegin(), (x).rend()
#define COMP(x) sort(ALL(x)); x.resize(unique(ALL(x)) - (x).begin())
#define forn(i, n) for (int i = 0; i < (int)(n); ++i)
#define fore(i, a, b) for (int i = (int)(a); i <= (int)(b); ++i)
#define ford(i, n) for (int i = (int)(n) - 1; i >= 0; --i)

using pii = pair <int, int>;
using vi = vector <int>;
using vpi = vector <pii>;
using ll = long long;
using pll = pair<ll, ll>;
using vl = vector<ll>;
using ld = long double;
using vld = vector<ld>;

const int maxn = 810, P=31; 
const ll mod[2] = {(ll)1e9+7, (ll)1e9+9};
ll add(ll a, ll b, int m) { return a + b >= mod[m] ? a + b - mod[m] : a + b; }
ll sub(ll a, ll b, int m) { return a >= b ? a - b : a - b + mod[m]; }
ll mul(ll a, ll b, int m) { return a*b%mod[m]; }
ll val[maxn];
ll pw[2][maxn];
ll lcp[maxn][maxn];
ll h[2][maxn];
int n;
char s[maxn];
void roll() {
	pw[0][0] = pw[1][0] = 1;
	fore(i, 1, maxn-1) {
		forn(j, 2) pw[j][i] = mul(pw[j][i-1], P, j);
	}
	forn(i, n) {
		forn(j, 2) {
			h[j][i] = mul(s[i] - 'a' + 1, pw[j][i], j);
			if (i) h[j][i] = add(h[j][i], h[j][i-1], j);
		}
	}
}
ll get(int l, int r) {
	vl hash(2);
	forn(j, 2) {
		hash[j] = h[j][r];
		if (l) hash[j] = sub(hash[j], h[j][l-1], j);
		hash[j] = mul(hash[j], pw[j][maxn-1-r], j);
	}
	return hash[0] << 32 | hash[1];
}
int main() {
	ios_base::sync_with_stdio(0), cin.tie(0);
	//freopen("input.txt", "r", stdin);
	//freopen("output.txt", "w", stdout);
	cin >> s;
	n = strlen(s);
	roll();
	int ans = 0;
	forn(i, n) fore(j, i, n-1) {
		ll cur = get(i, j);
		int len=j-i+1;
		forn(k, n) val[k]=0;

		for(int k=j+1; k+len-1 < n; k++) ans += get(k, k+len-1) == cur;

		int have = 0;
		for(int k=0; k+len-1 < i; k++) {
			val[k] = get(k, k+len-1) == cur;
			have += val[k]; 
		}
		for(int k=j+1; k+len-1 < n; k++) {
			val[k] = get(k, k+len-1) == cur;
			have += val[k];
		}

		for (int w=1, l=i-1, r=j+1; w <= min(i, n-j-1); w++) {
			if (get(i-w, i-1) != get(j+1, j+w)) continue;
			while (l >= 0 && l+len-1 >= i-w) {
				have -= val[l];
				l--;
			}
			while (r < n && r-len+1 <= j+w) {
				have -= val[r];
				r++;
			}
			ans += have;
		}

	}
	cout << ans << endl;
}

Details

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Test #1:

score: 100
Accepted
time: 0ms
memory: 3420kb

input:

aaaa

output:

9

result:

ok single line: '9'

Test #2:

score: 0
Accepted
time: 1ms
memory: 3400kb

input:

axabxbcxcdxd

output:

22

result:

ok single line: '22'

Test #3:

score: -100
Wrong Answer
time: 389ms
memory: 3420kb

input:

xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...

output:

448448889

result:

wrong answer 1st lines differ - expected: '536006700', found: '448448889'