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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#241086 | #6567. Repetitive String Invention | MovingUp# | TL | 843ms | 8784kb | C++23 | 2.2kb | 2023-11-05 22:56:20 | 2023-11-05 22:56:20 |
Judging History
answer
#include <algorithm>
#include <iostream>
#include <map>
#include <unordered_map>
#include <vector>
using namespace std;
const int BASE[] = {37, 43};
const int MOD = 1e9 + 7;
int fastPow(int x, int pw, int mod) {
if (pw == 0)
return 1;
else if (pw % 2 == 0) {
int tmp = fastPow(x, pw / 2, mod);
return ((int64_t)tmp * tmp) % mod;
} else
return ((int64_t)x * fastPow(x, pw - 1, mod)) % mod;
}
struct rolling_hash {
vector<int> multInvs[2];
vector<int> sums[2];
rolling_hash(const std::string &s) {
int n = s.size();
for (int h = 0; h < 2; h++) {
int currPw = 1;
sums[h].resize(n);
for (int i = 0; i < n; i++) {
sums[h][i] = ((int64_t)(s[i] - 'a' + 1) * currPw) % MOD;
if (i != 0)
sums[h][i] = (sums[h][i] + sums[h][i - 1]) % MOD;
multInvs[h].push_back(fastPow(currPw, MOD - 2, MOD));
currPw = ((int64_t)currPw * BASE[h]) % MOD;
}
}
}
pair<int, int> getSubhash(int l, int r) {
vector<int> res(2);
for (int h = 0; h < 2; h++) {
int tmp = sums[h][r] - (l == 0 ? 0 : sums[h][l - 1]);
if (tmp < 0)
tmp += MOD;
res[h] = ((int64_t)tmp * multInvs[h][l]) % MOD;
}
return {res[0], res[1]};
}
};
int64_t count(const string &s, bool countZeroGreen) {
rolling_hash rh = rolling_hash(s);
int n = s.size();
int64_t ans = 0;
map<pair<int, int>, int> cntWithHash;
for (int lGreen = 0; lGreen < n; lGreen++) {
for (int lRed = lGreen + (1 - countZeroGreen); lRed < n; lRed++) {
for (int rRed = lRed; rRed < n; rRed++) {
int lenGreen = lRed - lGreen;
if (lenGreen != 0 && rRed + lenGreen < n &&
rh.getSubhash(lGreen, lRed - 1) !=
rh.getSubhash(rRed + 1, rRed + lenGreen))
continue;
if (rRed + lenGreen >= n)
continue;
auto h = rh.getSubhash(lRed, rRed);
ans += cntWithHash[h];
}
}
for (int i = 0; i <= lGreen; i++) {
auto h = rh.getSubhash(i, lGreen);
cntWithHash[h]++;
}
}
return ans;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
string s;
cin >> s;
int64_t ans = count(s, true);
reverse(s.begin(), s.end());
ans += count(s, false);
cout << ans << endl;
}
Details
Tip: Click on the bar to expand more detailed information
Test #1:
score: 100
Accepted
time: 0ms
memory: 3616kb
input:
aaaa
output:
9
result:
ok single line: '9'
Test #2:
score: 0
Accepted
time: 0ms
memory: 3824kb
input:
axabxbcxcdxd
output:
22
result:
ok single line: '22'
Test #3:
score: 0
Accepted
time: 843ms
memory: 3564kb
input:
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...
output:
536006700
result:
ok single line: '536006700'
Test #4:
score: 0
Accepted
time: 586ms
memory: 3660kb
input:
abababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababababab...
output:
136016600
result:
ok single line: '136016600'
Test #5:
score: 0
Accepted
time: 0ms
memory: 3560kb
input:
a
output:
0
result:
ok single line: '0'
Test #6:
score: 0
Accepted
time: 0ms
memory: 3528kb
input:
ab
output:
0
result:
ok single line: '0'
Test #7:
score: 0
Accepted
time: 0ms
memory: 3616kb
input:
aa
output:
1
result:
ok single line: '1'
Test #8:
score: 0
Accepted
time: 329ms
memory: 8156kb
input:
bbbbbrrrrbrbrrbrbrbrbbrrbbbbrrbrrbrbrbrrrrrbbbrrbrrbbrrrbbbbbrrrrbbrbbrrrrrbbrrrbbbbbrbbrbbbrbrrbrrrrrrrrbbrbrbbrrrrrrbbbbbrbrrrrbrrbbrbrrrrrbrbrbbrbrrbrrrrbrbbrbrrbrrbbbbrrrrrbrbbrbbrrrrrbrbrbrbbbrrrrrrrbbbbbbrrbrbrrrrrbbbrbrrrrbbbbrrbrrbbbbbbbrbbbbrrrbrbbbrrrrrrbbbbbrbrrbbbbrbrbrrbbrrrbbbrbbbrbbrr...
output:
209015
result:
ok single line: '209015'
Test #9:
score: 0
Accepted
time: 354ms
memory: 8576kb
input:
fkrryithikkpurfezufbthxxrtejxpprhrhurrfziigzgajipayrefarpxuggehkiggeppfjghuyejuagkjpiezhmfizgphkkfffifihrimuhgtgzykfupbprjyrbpbimapjmbkrhubzhgfhhpkrxgjgmkheiiugiyerggyukyfuuxgrehgayafzuxymxxabygpapbjxipkxgbxhzpekypfghaumukguaipphiyhzimzfmpmzahbmaagytygyekzhktbbheetxrbipgytppgbhkpimrybkbeirhrzytfehba...
output:
5696
result:
ok single line: '5696'
Test #10:
score: 0
Accepted
time: 347ms
memory: 8784kb
input:
ayeaecauuueerrcsyyyuayauarecyrruueeucacrrcesercyeasuscucscruaaresaeruurreeursssuyraeysurecacueuacycacsyuyeyusssassaasyuarrcecueayacucuyyrsasrycyrrcececyuccecyreyeccuesaasceasussaraeruyarcauarcecacrucryryseysauaucyaeyurueurerrccrayyyycccsuaaesrecurucerrascyacucucryarycayeesyysusserarseyrauyrryeacauec...
output:
18249
result:
ok single line: '18249'
Test #11:
score: 0
Accepted
time: 323ms
memory: 8068kb
input:
lclccclcclllccccclcclclcccclllllcclcclclcclllllcllccclclclccclccllcclccccccllccclclcccclclcclclccclllllccclcccccclllllccllcclclllllllccclllcllllccccccccllccclllccclcllllllllcclccclccccllccllclclcclcllcllccclcllclllclclllclllcllcclclllccclcclclllclllllllcclllcccccllcllcllcclcclcllccclclllclclcccllcll...
output:
207835
result:
ok single line: '207835'
Test #12:
score: 0
Accepted
time: 335ms
memory: 8396kb
input:
lygxvkxeeiixzzpamosqadacrnyierrztikxheupgbkfkstyjrmyvhmjrhfhwfdeyhzuyhhbczbjgcnzouiufetegmnvxoeqxiykkwysdnnmdjtpwwzpdaqzmwmapbqbdjsdoxmpbvseyfrrqpgteehoxqsjszykfqgdmcgwikavcnhoubonianpecjtumdutpxwioqtkystzndrbtlfircdsnsxraoitswvhjirqxxjrnjjsldbmdcjngecdaotrgxvikyfyjlbbeketxrxeknuxmxehvabyyyxnrchukft...
output:
3442
result:
ok single line: '3442'
Test #13:
score: 0
Accepted
time: 352ms
memory: 8028kb
input:
yjjxyyxjxyjjyxyyjxyyjxjxjxjyxyxxjxjjyxxxxxjjxyxxyjjxxjyyjjjyyyxjyjxjxyjjyjxjyjyyxjyjyjyyxxyyxxxjjxxxyyyjjjyxjyxjxjyjxjyyyjjxxxjxxjxjjjyjxjyjyyxjyjyjyyxxyyxxxjjxxxyyyjjjyxjyxjxjyjxjyyyjjxxxjxxjxjyjjxyyxjxyjjyxyyjxyyjxjxjxjyxyxxjxjjyxxxxxjjxyxxyjjxxjyyjjjyyyxjyjxjxyjjxyyxjxyjjyxyyjxyyjxjxjxjyxyxxjxjjy...
output:
103111
result:
ok single line: '103111'
Test #14:
score: 0
Accepted
time: 360ms
memory: 8304kb
input:
lhllhlhlhllhlhllhhlhhhhllhhlhhhhllhhlhhhhllhllhhllhhlhhhhllhllhhhhhllhhlhhhhhlhllhlhhlhllhlhhhhllhllhhhllhhlhhhhhhlhllhlhllhhlhhhhhhlhllhlhhllhllllhllhhhlhllhlhhhllhhlhhhhhhllhhlhhhhlhllhlhllhllhhhhllhllllhllllhllllhlllhllhlhllhhlhhhhhhhllhlllhllhlhllhhlhhhhllhllllhlllhllhlhllhllhhhhhhhllhhlhhhhllhh...
output:
298186
result:
ok single line: '298186'
Test #15:
score: 0
Accepted
time: 368ms
memory: 7832kb
input:
blbllblbblbllblbblbllblblblbblllblbbllblbllblbblbllblbblbllblblblbbllblbllblblblbbllblbllblbblbllblblblbbllblbllblblblbbllblbllblbblbllblbblbllblblblbblllblbblllblbblllblbbllblbllblblblbblllblbblllblbbllblbllblblblbblllblbbllblbllblbblbllblbblbllblblblbblllblbblllblbbllblbllblblblbblllblbblllblbblll...
output:
510790
result:
ok single line: '510790'
Test #16:
score: 0
Accepted
time: 384ms
memory: 7284kb
input:
aqqaqaaqqaaqaqqaqaaqaqqaaqqaqaaqqaaqaqqaaqqaqaaqaqqaqaaqqaaqaqqaqaaqaqqaaqqaqaaqaqqaqaaqqaaqaqqaaqqaqaaqqaaqaqqaqaaqaqqaaqqaqaaqqaaqaqqaaqqaqaaqaqqaqaaqqaaqaqqaaqqaqaaqqaaqaqqaqaaqaqqaaqqaqaaqaqqaqaaqqaaqaqqaqaaqaqqaaqqaqaaqqaaqaqqaaqqaqaaqaqqaqaaqqaaqaqqaqaaqaqqaaqqaqaaqaqqaqaaqqaaqaqqaaqqaqaaqqaaq...
output:
584698
result:
ok single line: '584698'
Test #17:
score: -100
Time Limit Exceeded
input:
xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx...