#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define ull unsigned long long
#define pb push_back
#define pll pair<ll, int>
#define pii pair<int, int>
#define fi first
#define se second
using namespace std;
const int N = 5e5+5;
const int M = 14;
const ll inf = 1e9;
const int base = 350;
const int mod = 998244353;
int n, t, m, k, q, c[N], a[N], b[N];
ll ans, tong, d[N];
vector<int> vi, adj[N], gr[N];
mt19937_64 mt(chrono::steady_clock::now().time_since_epoch().count());
string s;
void add(int& x, int y)
{
x += y;
if(x >= mod)x -= mod;
if(x < 0)x += mod;
}
struct BIT
{
int n;
vector<int> fe;
BIT(int _n)
{
n = _n;
fe.resize(n+1, 0);
}
void add(int id, int x)
{
for(; id <= n; id += id & -id)fe[id] += x;
}
void add(int l, int r, int x)
{
add(l, x);
add(r+1, -x);
}
int get(int id)
{
int res = 0;
for(; id; id -= id & -id)res += fe[id];
return res;
}
};
void sol()
{
cin >> n >> m;
for(int i = 1; i <= n; i ++)
{
cin >> a[i];
vi.pb(a[i]);
}
sort(vi.begin(), vi.end());
vi.erase(unique(vi.begin(), vi.end()), vi.end());
for(int i = 1; i <= n; i ++)
a[i] = lower_bound(vi.begin(), vi.end(), a[i]) - vi.begin();
for(int i = 1; i <= m; i ++)
{
cin >> b[i] >> k;
adj[k].pb(i);
}
BIT bit(n);
for(int i = 1; i <= n; i ++)
{
gr[a[i]].pb(i);
if(gr[a[i]].size() >= 2)
{
int l = gr[a[i]].size() == 2 ? 1 : gr[a[i]][gr[a[i]].size()-3]+1;
int r = gr[a[i]][gr[a[i]].size()-2];
bit.add(l, r, 1);
}
if(gr[a[i]].size() >= 3)
{
int l = gr[a[i]].size() == 3 ? 1 : gr[a[i]][gr[a[i]].size()-4]+1;
int r = gr[a[i]][gr[a[i]].size()-3];
bit.add(l, r, -1);
}
for(int j: adj[i])d[j] = bit.get(b[j]);
}
for(int i = 1; i <= m; i ++)cout << d[i] <<'\n';
}
int main()
{
cin.tie(0);
cout.tie(0);
ios_base::sync_with_stdio(0);
#define task "test"
if(fopen(task".inp", "r"))
{
freopen(task".inp", "r", stdin);
freopen(task".out", "w", stdout);
}
int ntest = 1;
//cin >> ntest;
while(ntest -- > 0)
sol();
return 0;
}
/*
2 2
4 2 2 3 5
6 4 2 1 3 5 7
*/
Compilation message
poklon.cpp: In function 'int main()':
poklon.cpp:97:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
97 | freopen(task".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
poklon.cpp:98:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
98 | freopen(task".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
13 ms |
23756 KB |
Output is correct |
| 2 |
Correct |
13 ms |
23756 KB |
Output is correct |
| 3 |
Correct |
13 ms |
23804 KB |
Output is correct |
| 4 |
Correct |
14 ms |
24056 KB |
Output is correct |
| 5 |
Correct |
66 ms |
30036 KB |
Output is correct |
| 6 |
Correct |
72 ms |
30192 KB |
Output is correct |
| 7 |
Correct |
148 ms |
36824 KB |
Output is correct |
| 8 |
Correct |
249 ms |
44168 KB |
Output is correct |
| 9 |
Correct |
352 ms |
50588 KB |
Output is correct |
| 10 |
Correct |
418 ms |
56692 KB |
Output is correct |
