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QOJ
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 |
---|---|---|---|---|---|---|---|---|---|
#655966 | #9482. Count Pseudo-Palindromes | ucup-team3931# | TL | 4ms | 34556kb | C++14 | 3.6kb | 2024-10-19 10:34:35 | 2024-10-19 10:34:39 |
Judging History
answer
#include <bits/stdc++.h>
#define pb emplace_back
#define fst first
#define scd second
#define mkp make_pair
#define mems(a, x) memset((a), (x), sizeof(a))
using namespace std;
typedef long long ll;
typedef double db;
typedef unsigned long long ull;
typedef long double ldb;
typedef pair<int, int> pii;
const int maxn = 1000100;
int n, a[maxn], ans[maxn], c[maxn], d[maxn];
vector<int> b[maxn];
void dfs(int l, int r) {
if (l == r) {
++ans[l];
return;
}
int mid = (l + r) >> 1;
dfs(l, mid);
dfs(mid + 1, r);
for (int i = mid; i <= r + 1; ++i) {
d[i] = 0;
}
for (int i = mid + 1; i <= r; ++i) {
int j = b[a[i]][0] ^ b[a[i]][1] ^ i;
if (i < j && j <= r) {
++d[i];
--d[j];
}
if (j < l || j > r) {
++d[i];
--d[r + 1];
}
}
for (int i = mid + 1; i <= r; ++i) {
d[i] += d[i - 1];
}
for (int i = mid + 1; i <= r; ++i) {
d[i] = d[i - 1] + (!d[i]);
}
set<pii> S;
set<int> T;
T.insert(r + 1);
for (int i = l; i <= mid; ++i) {
c[a[i]] = 0;
if (b[a[i]][0] == i && mid < b[a[i]][1] && b[a[i]][1] <= r) {
T.insert(b[a[i]][1]);
}
}
S.emplace(mid + 1, 0);
// printf("l, r: %d %d\n", l, r);
for (int i = mid; i >= l; --i) {
if (b[a[i]][0] == i && mid < b[a[i]][1] && b[a[i]][1] <= r) {
T.erase(b[a[i]][1]);
}
c[a[i]] ^= 1;
if (c[a[i]]) {
int j = b[a[i]][0] ^ b[a[i]][1] ^ i;
// printf("insert %d\n", i);
if (mid < j && j <= r) {
S.emplace(j, i);
} else {
S.emplace(r + 1, i);
}
} else {
S.erase(mkp(r + 1, b[a[i]][0] ^ b[a[i]][1] ^ i));
}
// printf("sz: %d\n", (int)S.size());
if ((int)S.size() > 1) {
int l1 = mid + 1, r1 = *T.begin() - 1;
pii p = *(--S.end()), q = *(----S.end());
int l2 = q.fst, r2 = p.fst - 1;
int L = max(l1, l2), R = min(r1, r2);
if (L <= R) {
// printf("%d %d %d %d\n", i, p.scd, L, R);
ans[p.scd] += d[R] - d[L - 1];
}
}
}
S.clear();
T.clear();
for (int i = l - 1; i <= mid + 1; ++i) {
d[i] = 0;
}
for (int i = l; i <= mid; ++i) {
int j = b[a[i]][0] ^ b[a[i]][1] ^ i;
if (l <= i && i < j && j <= mid) {
++d[i + 1];
--d[j + 1];
}
if (j < l || j > r) {
++d[l];
--d[i + 1];
}
}
for (int i = l; i <= mid; ++i) {
d[i] += d[i - 1];
}
for (int i = l; i <= mid; ++i) {
d[i] = d[i - 1] + (!d[i]);
}
T.insert(l - 1);
for (int i = mid + 1; i <= r; ++i) {
c[a[i]] = 0;
if (b[a[i]][1] == i && l <= b[a[i]][0] && b[a[i]][0] <= mid) {
T.insert(b[a[i]][0]);
}
}
S.emplace(mid, 0);
// printf("l, r: %d %d\n", l, r);
for (int i = mid + 1; i <= r; ++i) {
if (b[a[i]][1] == i && l <= b[a[i]][0] && b[a[i]][0] <= mid) {
T.erase(b[a[i]][0]);
}
c[a[i]] ^= 1;
if (c[a[i]]) {
int j = b[a[i]][0] ^ b[a[i]][1] ^ i;
// printf("insert %d\n", i);
if (l <= j && j <= mid) {
S.emplace(j, i);
} else {
S.emplace(l - 1, i);
}
} else {
S.erase(mkp(l - 1, b[a[i]][0] ^ b[a[i]][1] ^ i));
}
if ((int)S.size() > 1) {
int l1 = *T.rbegin() + 1, r1 = mid;
pii p = *S.begin(), q = *(++S.begin());
int l2 = p.fst + 1, r2 = q.fst;
int L = max(l1, l2), R = min(r1, r2);
if (L <= R) {
// printf("%d %d %d %d\n", i, p.scd, L, R);
ans[p.scd] += d[R] - d[L - 1];
}
}
}
}
void solve() {
scanf("%d", &n);
for (int i = 1; i <= n * 2; ++i) {
scanf("%d", &a[i]);
b[a[i]].pb(i);
}
dfs(1, n * 2);
for (int i = 1; i <= n * 2; ++i) {
printf("%d%c", ans[i], " \n"[i == n * 2]);
}
}
int main() {
int T = 1;
// scanf("%d", &T);
while (T--) {
solve();
}
return 0;
}
详细
Test #1:
score: 100
Accepted
time: 3ms
memory: 34220kb
input:
2 1 1 2 2
output:
1 2 2 1
result:
ok 4 tokens
Test #2:
score: 0
Accepted
time: 4ms
memory: 34556kb
input:
3 2 1 2 3 1 3
output:
1 2 2 2 2 1
result:
ok 6 tokens
Test #3:
score: 0
Accepted
time: 4ms
memory: 34404kb
input:
4 1 2 4 3 4 1 3 2
output:
1 2 1 2 1 3 1 1
result:
ok 8 tokens
Test #4:
score: 0
Accepted
time: 3ms
memory: 34000kb
input:
1 1 1
output:
1 1
result:
ok 2 tokens
Test #5:
score: -100
Time Limit Exceeded
input:
500000 233733 151347 468353 495903 234861 297169 312993 2734 287872 359375 79017 285205 219439 37290 409190 194953 306816 472906 123794 121028 66509 62235 385879 300188 485875 72413 167304 333428 33910 220100 151575 22575 206653 82054 111518 34032 48702 198940 6262 222529 170641 1735 38943 235003 11...