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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#734031 | #9543. Good Partitions | YYCQAQ | WA | 69ms | 36768kb | C++20 | 3.1kb | 2024-11-10 23:12:51 | 2024-11-10 23:12:51 |
Judging History
answer
#include<bits/stdc++.h>
#define int long long
using namespace std;
const int N = 2e5 + 100;
template<typename Info>
struct SegmentTree {
int n;
vector<Info> info;
SegmentTree() :n(1) {}
SegmentTree(int _n) :info((_n + 1) * 4 , Info()) , n(_n) {
build(1 , 1 , _n , Info());
}
SegmentTree(int _n , const Info& _k) :info((_n + 1) * 4 , Info()) , n(_n) {
build(1 , 1 , _n , _k);
}
SegmentTree(int _n , vector<Info> _init) :info((_n + 1) * 4 , Info()) , n(_n) {
build(1 , 1 , _n , _init);
}
void pushup(int p) {
info[p] = info[p << 1] + info[p << 1 | 1];
}
void build(int p , int l , int r , vector<Info>& _init)
{
info[p] = _init[l];
if (l == r)
return;
int mid = l + r >> 1;
build(p << 1 , l , mid , _init);
build(p << 1 | 1 , mid + 1 , r , _init);
pushup(p);
}
void build(int p , int l , int r , const Info& k)
{
info[p] = k;
if (l == r)
return;
int mid = l + r >> 1;
build(p << 1 , l , mid , k);
build(p << 1 | 1 , mid + 1 , r , k);
pushup(p);
}
void modify(int p , int L , int R , int x , const Info& k) {
if (L == R) {
info[p] = k;
return;
}
int mid = L + R >> 1;
if (x <= mid) modify(p << 1 , L , mid , x , k);
else modify(p << 1 | 1 , mid + 1 , R , x , k);
pushup(p);
}
void modify(int x , const Info& k) {
modify(1 , 1 , n , x , k);
}
Info query(int p , int L , int R , int l , int r) {
if (l > R || r < L) {
return Info();
}
if (l <= L && R <= r) {
return info[p];
}
int mid = L + R >> 1;
return query(p << 1 , L , mid , l , r) + query(p << 1 | 1 , mid + 1 , R , l , r);
}
Info query(int l , int r) {
return query(1 , 1 , n , l , r);
}
};
struct Info {
int val = 0;
};
Info operator+(const Info& a , const Info& b) {
return Info{ __gcd(a.val,b.val) };
}
int a[200005];
vector<int> p[N];
void init() {
for (int i = 1;i <= 2e5;i++) {
for (int j = 1;j * i <= 2e5;j++) {
p[i * j].push_back(i);
}
}
}
void solve() {
int n , q;
cin >> n >> q;
for (int i = 1;i <= n;i++) {
cin >> a[i];
}
a[n + 1] = 0x7f7f7f7f;
SegmentTree<Info> sg(n , Info());
for (int i = 1;i < n;i++) {
if (a[i] > a[i + 1]) {
sg.modify(i , Info{ i });
}
}
cout << p[sg.query(1 , n).val].size() << endl;
while (q--) {
int x , v;
cin >> x >> v;
if (x - 1 > 0)sg.modify(x - 1 , Info{ 0 });
sg.modify(x , Info{ 0 });
a[x] = v;
if (a[x] > a[x + 1]) {
sg.modify(x , Info{ x });
}
if (a[x - 1] > a[x]) {
sg.modify(x - 1 , Info{ x - 1 });
}
cout << p[sg.query(1 , n).val].size() << endl;
}
}
signed main() {
init();
int t = 1;
cin >> t;
while (t--) solve();
}
Details
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Test #1:
score: 100
Accepted
time: 69ms
memory: 36744kb
input:
1 5 2 4 3 2 6 1 2 5 3 5
output:
1 2 3
result:
ok 3 lines
Test #2:
score: -100
Wrong Answer
time: 55ms
memory: 36768kb
input:
1 1 1 2000000000 1 1999999999
output:
0 0
result:
wrong answer 1st lines differ - expected: '1', found: '0'