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ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#574123 | #9313. Make Max | youthpaul | TL | 0ms | 0kb | C++20 | 2.3kb | 2024-09-18 20:51:27 | 2024-09-18 20:51:27 |
answer
#include<bits/stdc++.h>
#define fore(i, l, r) for(int i = (int)(l); i < (int)(r); ++i)
#define fi first
#define se second
#define endl '\n'
#define ull unsigned long long
#define ALL(v) v.begin(), v.end()
const int INF = 0x3f3f3f3f;
const long long INFLL = 1e18;
using ll = long long;
const int N = 200005;
const int K = 18;
int LOG2[N];
int main(){
std::ios::sync_with_stdio(false);
std::cin.tie(nullptr);
LOG2[0] = -1;
fore(i, 1, N) LOG2[i] = LOG2[i >> 1] + 1;
int t;
std::cin >> t;
while(t--){
int n;
std::cin >> n;
const int K = LOG2[n];
std::vector<std::vector<int>> st(n + 1, std::vector<int>(K + 1));
std::vector<int> a(n + 1);
std::vector<std::vector<int>> pos(n + 1);
std::vector<int> vec;
fore(i, 1, n + 1){
std::cin >> a[i];
vec.push_back(a[i]);
}
std::sort(ALL(vec));
vec.erase(unique(ALL(vec)), vec.end());
fore(i, 1, n + 1){
a[i] = std::lower_bound(ALL(vec), a[i]) - vec.begin() + 1;
pos[a[i]].push_back(i);
}
fore(i, 1, n + 1) st[i][0] = a[i];
fore(k, 1, K + 1)
for(int i = 1; i + (1 << k) - 1 <= n; ++i)
st[i][k] = std::max(st[i][k - 1], st[i + (1 << k - 1)][k - 1]);
auto query = [&](int l, int r) -> int {
int k = LOG2[r - l + 1];
return std::max(st[l][k], st[r - (1 << k) + 1][k]);
};
auto dfs = [&](auto self, int l, int r) -> ll {
int mx = query(l, r);
ll res = 0;
auto it = std::lower_bound(ALL(pos[mx]), l);
std::vector<std::pair<int, int>> inv;
int lst = l;
while(it != pos[mx].end()){
int p = *it;
if(p > r) break;
if(p > lst){
inv.push_back({lst, p - 1});
}
lst = p + 1;
}
if(lst <= r) inv.push_back({lst, r});
for(auto [_l, _r] : inv){
res += _r - _l + 1;
res += self(self, _l, _r);
}
return res;
};
std::cout << dfs(dfs, 1, n) << endl;
}
return 0;
}
Details
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Test #1:
score: 0
Time Limit Exceeded
input:
4 2 1 2 2 2 2 7 1 1 1 2 2 2 2 3 1 2 3