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QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#575582 | #9313. Make Max | HSJasdfghjkl | WA | 0ms | 3876kb | C++17 | 1.8kb | 2024-09-19 15:36:25 | 2024-09-19 15:36:27 |
Judging History
answer
#include<bits/stdc++.h>
using namespace std;
using Int = long long;
using uInt = unsigned long long;
#define lowbit(x) ((x) & - (x))
using ll = long long;
void update(vector<int>& tr, int x, ll v) { // 单点修改(加)
for (; x < tr.size(); x += lowbit(x))
tr[x] += v;
}
ll qr(vector<int>& tr, int x) { //前缀查询
ll sum = 0;
for (x; x >= 1; x -= lowbit(x)) sum += tr[x];
return sum;
}
ll query(vector<int>& tr, int l, int r) { //区间查询
return qr(tr, r) - qr(tr, l - 1);
}
bool cmp(pair<int, int>& p1,pair<int, int>& p2) {
if (p1.first != p2.first)return p1.first > p2.first;
return p1.second < p2.second;
}
void solve() {
int n; cin >> n;
vector<int>v(n + 1),cnt;
cnt.push_back(0);
for (int u = 1; u <= n; ++u)cin >> v[u], cnt.push_back(v[u]);
sort(v.begin(), v.end());
v.resize(unique(v.begin(), v.end())-v.begin());
for (int u = 1; u <= n; ++u)
cnt[u] = lower_bound(v.begin(), v.end(), cnt[u]) - v.begin();
vector<pair<int, int>>vp(n + 1);
for (int u = 1; u <= n; ++u)vp[u].first = cnt[u], vp[u].second = u;
sort(vp.begin()+1, vp.end(),cmp);
vector<int>is(n+1);
Int ans = 0;
for (int u = 1; u <= n; ++u) {
int l =1, r = vp[u].second;
while (l + 1 < r) {
int mid = l + r >> 1;
int sum = query(is, mid, vp[u].second);
if (sum) r = mid;
else l = mid;
}
ans += (vp[u].second - l);
if (u==n|| vp[u].first != vp[u + 1].first) {
int l = vp[u].second, r = n + 1;
while (l + 1 < r) {
int mid = l + r >> 1;
int sum = query(is, vp[u].second, mid);
if (sum) r = mid;
else l = mid;
}
ans += (l-vp[u].second);
}
update(is, vp[u].second, 1);
}
std::cout << ans << endl;
}
int main() {
cin.tie(0)->sync_with_stdio(0);
for(int i=1,n=(cin>>n,n);i<=n;++i)
solve();
return 0;
}
Details
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Test #1:
score: 0
Wrong Answer
time: 0ms
memory: 3876kb
input:
4 2 1 2 2 2 2 7 1 1 1 2 2 2 2 3 1 2 3
output:
1 1 19 2
result:
wrong answer 2nd numbers differ - expected: '0', found: '1'