QOJ.ac
QOJ
ID | Problem | Submitter | Result | Time | Memory | Language | File size | Submit time | Judge time |
---|---|---|---|---|---|---|---|---|---|
#608315 | #5278. Mex and Cards | wdbl857 | WA | 1ms | 9884kb | C++20 | 4.8kb | 2024-10-03 20:38:27 | 2024-10-03 20:38:28 |
Judging History
answer
#include <bits/stdc++.h>
using namespace std;
#define xx first
#define yy second
#define endl "\n"
#define pb push_back
#define int long long
#define ll long long
#define lowbit(x) x & (-x)
typedef pair<int, int> pii;
#define LF(x) fixed << setprecision(x)
#define Yshanqian ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);
const int N = 3e5 + 10, M = 1010, inf = 0x3f3f3f3f, mod = 1e9 + 7, P = 13331;
int n;
int a[N], b[N];
multiset<int> st;
struct node
{
int l, r;
int mn, lazy;
} tr[N << 2];
void pushup(int u)
{
tr[u].mn = min(tr[u << 1].mn, tr[u << 1 | 1].mn);
}
void build(int u, int l, int r)
{
tr[u] = {l, r, 0, 0};
if (l == r)
return;
int mid = l + r >> 1;
build(u << 1, l, mid);
build(u << 1 | 1, mid + 1, r);
}
void change(int u, int x)
{
tr[u].mn += x;
tr[u].lazy += x;
}
void pushdown(int u)
{
if (tr[u].lazy)
{
change(u << 1, tr[u].lazy);
change(u << 1 | 1, tr[u].lazy);
tr[u].lazy = 0;
}
}
void modify(int u, int l, int r, int x)
{
if (tr[u].l >= l && tr[u].r <= r)
{
change(u, x);
return;
}
pushdown(u);
int mid = tr[u].l + tr[u].r >> 1;
if (l <= mid)
modify(u << 1, l, r, x);
if (r > mid)
modify(u << 1 | 1, l, r, x);
pushup(u);
}
int ask(int u, int l, int r)
{
if (tr[u].l >= l && tr[u].r <= r)
return tr[u].mn;
pushdown(u);
int mid = tr[u].l + tr[u].r >> 1;
int ans = inf;
if (l <= mid)
ans = min(ans, ask(u << 1, l, r));
if (r > mid)
ans = min(ans, ask(u << 1 | 1, l, r));
return ans;
}
int c[N];
void solve()
{
int ans = 0;
cin >> n;
build(1, 1, n + 10);
int mn = inf;
b[0] = inf;
int lst = -1;
for (int i = 1; i <= n; i++)
{
cin >> a[i];
b[i] = min(b[i - 1], a[i]);
if (b[i] != 0)
lst = i;
}
int s = 0;
for (int i = lst; i >= 1; i--)
{
if (b[i] > s)
{
ans += i * (b[i] - s);
for (int j = s; j < b[i]; j++)
st.insert(i);
}
if (a[i] - b[i] > 0)
modify(1, i, i, a[i] - b[i]);
s = b[i];
}
for (int i = lst + 1; i <= n; i++)
{
if (a[i])
modify(1, i, i, a[i]);
}
cout << ans << endl;
int q;
cin >> q;
while (q--)
{
int op, x;
cin >> op >> x;
x++;
if (op == 1)
{
if (x == 1)
{
if (ask(1, 2, 2) == 0)
{
ans++;
st.insert(1);
}
else
{
int l = 0, r = 2e5 + 10;
while (l < r)
{
int mid = l + r + 1 >> 1;
if (ask(1, x + 1, x + mid + 1))
l = mid;
else
r = mid - 1;
}
ans += r + 2;
modify(1, x + 1, x + 1 + r, -1);
st.insert(x + r + 1);
}
}
else
{
if (st.find(x - 1) != st.end())
{
int l = 0, r = 2e5 + 10;
while (l < r)
{
int mid = l + r + 1 >> 1;
if (ask(1, x + 1, x + 1 + mid))
l = mid;
else
r = mid - 1;
}
// cout << "---" << ask(1, 4, 5) << endl;
// cout << "---" << l << endl;
if (ask(1, x + 1, x + 1))
{
ans += r + 2;
modify(1, x + 1, x + 1 + r, -1);
st.erase(st.find(x - 1));
st.insert(x + r);
}
}
else
modify(1, x, x, 1);
}
}
else
{
if (ask(1, x, x))
{
modify(1, x, x, -1);
}
else
{
auto it = st.lower_bound(x);
if (it != st.end())
st.erase(it);
int now = *it;
ans -= now - x + 2;
modify(1, x + 1, now, 1);
}
}
cout << ans << endl;
}
}
signed main()
{
Yshanqian;
int T;
T = 1;
// cin >> T;
for (int cases = 1; cases <= T; ++cases)
{
// cout<<"Case #"<<cases<<": ";
solve();
}
return 0;
}
Details
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Test #1:
score: 100
Accepted
time: 0ms
memory: 9756kb
input:
5 2 1 3 0 2 6 1 0 1 1 2 4 1 3 2 1 2 1
output:
4 5 7 7 9 7 3
result:
ok 7 numbers
Test #2:
score: 0
Accepted
time: 1ms
memory: 9884kb
input:
1 0 0
output:
0
result:
ok 1 number(s): "0"
Test #3:
score: 0
Accepted
time: 1ms
memory: 9840kb
input:
10 3 8 1 4 10 3 10 9 7 10 20 2 5 1 4 1 2 1 4 1 3 1 3 1 0 2 8 1 5 1 4 1 0 1 3 1 8 1 6 1 4 1 1 1 5 1 9 1 6 2 7
output:
14 14 14 22 22 22 22 24 24 24 24 26 26 26 26 26 26 26 26 26 26
result:
ok 21 numbers
Test #4:
score: -100
Wrong Answer
time: 1ms
memory: 9764kb
input:
10 9 8 7 5 5 4 3 2 1 1 20 2 4 1 8 2 6 1 2 1 2 2 5 2 2 1 0 1 6 1 6 2 9 1 2 2 7 2 8 2 3 1 9 1 7 1 4 2 6 1 7
output:
45 43 43 41 41 41 39 37 38 38 38 36 36 34 37 35 35 35 35 35 35
result:
wrong answer 2nd numbers differ - expected: '44', found: '43'