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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 |
---|---|---|---|---|---|---|---|---|---|
#659332 | #9482. Count Pseudo-Palindromes | ucup-team3510# | TL | 32ms | 332076kb | C++14 | 3.9kb | 2024-10-19 19:40:51 | 2024-10-19 19:40:52 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 1e6 + 5, inf = 1e9;
int a[N];
struct num
{
int v;
ll c;
num(int v0 = 0, ll c0 = 0)
{
v = v0;
c = c0;
}
num operator + (num p)
{
return num(min(p.v, v), (v <= p.v ? c : 0ll) + (p.v <= v ? p.c : 0ll));
}
num operator * (num p)
{
return num(v + p.v, c * p.c);
}
};
num his[N << 2], now[N << 2], hv[N << 2], nv[N << 2];
void f(int p, num x, num y)
{
if(x.c)
his[p] = his[p] + now[p] * x;
now[p] = now[p] * y;
if(x.c)
hv[p] = hv[p] + nv[p] * x;
nv[p] = nv[p] * y;
}
void push_down(int p)
{
f(p << 1, hv[p], nv[p]);
f(p << 1 | 1, hv[p], nv[p]);
hv[p] = num(inf, 0);
nv[p] = num(0, 1);
}
void push_up(int p)
{
now[p] = now[p << 1] + now[p << 1 | 1];
his[p] = his[p << 1] + his[p << 1 | 1];
}
int sum[N];
void build(int p, int l, int r)
{
int mid = (l + r) >> 1;
hv[p] = num(inf, 0);
nv[p] = num(0, 1);
if(l == r)
{
his[p] = num(1, 0);
now[p] = num(sum[l], 1);
return ;
}
build(p << 1, l, mid);
build(p << 1 | 1, mid + 1, r);
push_up(p);
}
void upd(int p, int l, int r, int ql, int qr, num x, num y)
{
int mid = (l + r) >> 1;
if(ql <= l && r <= qr)
{
f(p, x, y);
return ;
}
push_down(p);
if(ql <= mid)
upd(p << 1, l, mid, ql, qr, x, y);
if(qr > mid)
upd(p << 1 | 1, mid + 1, r, ql, qr, x, y);
push_up(p);
return ;
}
num qry(int p, int l, int r, int ql, int qr)
{
int mid = (l + r) >> 1;
if(ql <= l && r <= qr)
return his[p];
push_down(p);
if(qr <= mid)
return qry(p << 1, l, mid, ql, qr);
if(ql > mid)
return qry(p << 1 | 1, mid + 1, r, ql, qr);
return qry(p << 1, l, mid, ql, qr) + qry(p << 1 | 1, mid + 1, r, ql, qr);
}
ll ans[N];
int lp[N], rp[N];
vector< pair<int, int> > ad[N], mn[N], qr[N];
int main()
{
int n, i;
scanf("%d", &n);
for(i = 1; i <= 2 * n; i++)
scanf("%d", a + i);
for(i = 1; i <= 2 * n; i++)
if(!lp[a[i]])
lp[a[i]] = i;
else
rp[a[i]] = i;
for(i = 1; i <= n; i++)
{
sum[lp[i]]++;
sum[rp[i]]--;
}
for(i = 1; i <= 2 * n; i++)
sum[i] += sum[i - 1];
build(1, 1, 2 * n);
for(i = 1; i <= 2 * n; i++)
{
ad[i].clear();
mn[i].clear();
qr[i].clear();
}
for(i = 1; i <= n; i++)
{
ad[lp[i] + 1].emplace_back(make_pair(rp[i], 2 * n));
mn[rp[i] + 1].emplace_back(make_pair(rp[i], 2 * n));
mn[lp[i] + 1].emplace_back(make_pair(lp[i], rp[i] - 1));
qr[lp[i]].emplace_back(make_pair(lp[i], rp[i] - 1));
}
for(i = 1; i <= 2 * n; i++)
{
for(auto p: ad[i])
upd(1, 1, 2 * n, p.first, p.second, num(inf, 0), num(1, 1));
for(auto p: mn[i])
upd(1, 1, 2 * n, p.first, p.second, num(inf, 0), num(-1, 1));
upd(1, 1, 2 * n, 1, 2 * n, num(0, 1), num(0, 1));
for(auto p: qr[i])
ans[i] += qry(1, 1, 2 * n, p.first, p.second).c;
}
for(i = 0; i <= 2 * n; i++)
sum[i] = 0;
for(i = 1; i <= n; i++)
{
lp[i] = 2 * n + 1 - lp[i];
rp[i] = 2 * n + 1 - rp[i];
swap(lp[i], rp[i]);
sum[lp[i]]++;
sum[rp[i]]--;
}
for(i = 1; i <= 2 * n; i++)
sum[i] += sum[i - 1];
build(1, 1, 2 * n);
for(i = 1; i <= 2 * n; i++)
{
ad[i].clear();
mn[i].clear();
qr[i].clear();
}
for(i = 1; i <= n; i++)
{
ad[lp[i] + 1].emplace_back(make_pair(rp[i], 2 * n));
mn[rp[i] + 1].emplace_back(make_pair(rp[i], 2 * n));
mn[lp[i] + 1].emplace_back(make_pair(lp[i], rp[i] - 1));
qr[lp[i]].emplace_back(make_pair(lp[i], rp[i] - 1));
}
for(i = 1; i <= 2 * n; i++)
{
for(auto p: ad[i])
upd(1, 1, 2 * n, p.first, p.second, num(inf, 0), num(1, 1));
for(auto p: mn[i])
upd(1, 1, 2 * n, p.first, p.second, num(inf, 0), num(-1, 1));
upd(1, 1, 2 * n, 1, 2 * n, num(0, 1), num(0, 1));
for(auto p: qr[i])
ans[2 * n + 1 - i] += qry(1, 1, 2 * n, p.first, p.second).c;
}
for(i = 1; i <= 2 * n; i++)
printf("%lld ", ans[i]);
printf("\n");
return 0;
}
詳細信息
Test #1:
score: 100
Accepted
time: 28ms
memory: 331616kb
input:
2 1 1 2 2
output:
1 2 2 1
result:
ok 4 tokens
Test #2:
score: 0
Accepted
time: 32ms
memory: 332076kb
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: 31ms
memory: 331584kb
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: 19ms
memory: 330936kb
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...