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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#164678 | #7108. Couleur | notpasscet_6 | AC ✓ | 4036ms | 67752kb | C++14 | 3.6kb | 2023-09-05 12:26:06 | 2023-09-05 12:26:06 |
Judging History
answer
// Problem: P3919 【模板】可持久化线段树 1(可持久化数组)
// Contest: Luogu
// URL: https://www.luogu.com.cn/problem/P3919
// Memory Limit: 1 MB
// Time Limit: 1500 ms
//
// Powered by CP Editor (https://cpeditor.org)
#include<bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int, int> pii;
#define x first
#define y second
const int N = 1e5 + 10;
int a[N], root[N];
int n, m, k;
struct Persistable_Segment_Tree {
int lc[N * 30], rc[N * 30], val[N * 30], cnt;
inline void build(int& o, int l, int r) {
o = ++cnt;
if (l == r) { return; }
int mid = (l + r) >> 1;
build(lc[o], l, mid); build(rc[o], mid + 1, r);
}
inline void ins(int& o, int pre, int l, int r, int q) {
o = ++cnt; lc[o] = lc[pre]; rc[o] = rc[pre]; val[o] = val[pre] + 1;
if (l == r) { return; }
int mid = (l + r) >> 1;
if (q <= mid)ins(lc[o], lc[pre], l, mid, q);
else ins(rc[o], rc[pre], mid + 1, r, q);
}
inline int query(int o, int l, int r, int ql, int qr) {
if(ql > qr) return 0;
if(ql <= l && qr >= r){
return val[o];
}
int mid = (l + r) >> 1, res = 0;
if (ql <= mid) res += query(lc[o], l, mid, ql, qr);
if (qr > mid) res += query(rc[o], mid + 1, r, ql, qr);
return res;
}
inline void clear(){
for(int i = 0; i <= cnt; i++){
lc[i] = rc[i] = val[i] = 0;
}
cnt = 0;
}
}T;
map<int, int> mp;
multiset<int> maxv;
void split(int l, int r, int x){
int base = mp[l - 1]; // [l ~ r]整个区间的逆序对
maxv.erase(maxv.lower_bound(base));
int t1 = 0, t2 = 0;
// t1是 (l ~ x) 或者 (x ~ r) 内的逆序对,
// t2是跨了两个区间的逆序对
// cout << l << ' ' << r << ' ' << x << '\n';
if(x - l < r - x){
for(int i = l + 1; i <= x; i++){
t1 += T.query(root[i - 1], 1, n, a[i] + 1, n)
- T.query(root[l - 1], 1, n, a[i] + 1, n);
}
for(int i = l; i <= x; i++){
t2 += T.query(root[r], 1, n, 1, a[i] - 1)
- T.query(root[x], 1, n, 1, a[i] - 1);
}
int temp = T.query(root[x - 1], 1, n, a[x] + 1, n)
- T.query(root[l - 1], 1, n, a[x] + 1, n);
mp[l - 1] = t1 - temp, mp[x] = base - t1 - t2;
maxv.insert(mp[l - 1]); maxv.insert(mp[x]);
}
else{
for(int i = x + 1; i <= r; i++){
t1 += T.query(root[i - 1], 1, n, a[i] + 1, n)
- T.query(root[x - 1], 1, n, a[i] + 1, n);
}
for(int i = x; i <= r; i++){
t2 += T.query(root[x - 1], 1, n, a[i] + 1, n)
- T.query(root[l - 1], 1, n, a[i] + 1, n);
}
int temp = T.query(root[r], 1, n, 1, a[x] - 1)
- T.query(root[x], 1, n, 1, a[x] - 1);
mp[x] = t1 - temp, mp[l - 1] = base - t1 - t2;
maxv.insert(mp[x]); maxv.insert(mp[l - 1]);
}
}
void solve(){
mp.clear(); maxv.clear();
cin >> n;
for(int i = 1; i <= n; i++){
cin >> a[i];
}
T.build(root[0], 1, n);
for(int i = 1; i <= n; i++){
T.ins(root[i], root[i - 1], 1, n, a[i]);
}
int base = 0;
for(int i = 2; i <= n; i++){
base += T.query(root[i - 1], 1, n, a[i] + 1, n);
}
mp[0] = base, mp[n + 1] = 0;
maxv.insert(base);
int ans = *maxv.rbegin();
for(int i = 1; i <= n; i++){
cout << ans << " \n"[i == n];
int x; cin >> x;
x ^= ans;
auto it = mp.lower_bound(x);
split((prev(it)->x) + 1, (it->x) - 1, x);
ans = *maxv.rbegin();
}
T.clear();
}
signed main(){
std::ios::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int t = 1;
cin >> t;
while(t--){
solve();
}
return 0;
}
这程序好像有点Bug,我给组数据试试?
Details
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Test #1:
score: 100
Accepted
time: 2ms
memory: 7756kb
input:
3 5 4 3 1 1 1 5 4 5 3 1 10 9 7 1 4 7 8 5 7 4 8 21 8 15 5 9 2 4 5 10 6 15 4 8 8 1 12 1 10 14 7 14 2 9 13 10 3 37 19 23 15 7 2 10 15 2 13 4 5 8 7 10
output:
7 0 0 0 0 20 11 7 2 0 0 0 0 0 0 42 31 21 14 14 4 1 1 1 0 0 0 0 0 0
result:
ok 3 lines
Test #2:
score: 0
Accepted
time: 4036ms
memory: 67752kb
input:
11116 10 10 5 10 3 6 4 8 5 9 8 31 27 24 11 12 3 0 2 3 1 10 8 2 7 2 8 10 1 10 9 10 6 5 2 13 2 1 0 1 3 1 10 7 10 7 6 1 3 10 6 7 9 21 18 10 1 6 5 4 8 9 10 10 2 10 4 8 8 5 7 2 6 7 20 10 9 1 15 0 4 2 9 7 10 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 10 1 2 3 4 5 6 7 8 9 10 6 3 5 2 7 10 9 1 4 8 10 1 10 1 3...
output:
21 18 16 12 10 6 4 1 1 0 12 12 10 10 4 4 4 2 1 0 20 16 9 5 3 3 3 0 0 0 22 14 8 8 5 5 2 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 12 7 4 4 2 2 1 0 0 20 18 8 3 1 1 0 0 0 0 45 21 21 10 3 3 3 0 0 0 17 11 8 2 1 1 1 0 0 0 13 4 1 0 0 0 0 0 0 0 29 27 22 15 9 7 4 3 1 0 26 16 9 2 1 1 1 1 1 0 0 0 0 0 0 ...
result:
ok 11116 lines
Extra Test:
score: 0
Extra Test Passed