/*************************************
* author: marvinthang *
* created: 24.04.2024 16:30:43 *
*************************************/
#include <bits/stdc++.h>
using namespace std;
#define fi first
#define se second
#define left ___left
#define right ___right
#define TIME (1.0 * clock() / CLOCKS_PER_SEC)
#define MASK(i) (1LL << (i))
#define BIT(x, i) ((x) >> (i) & 1)
#define __builtin_popcount __builtin_popcountll
#define ALL(v) (v).begin(), (v).end()
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define REPD(i, n) for (int i = (n); i-- > 0; )
#define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); --i >= _a; )
#define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u)
#define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u)
#ifdef LOCAL
#include "debug.h"
#else
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
#define DB(...) 23
#define db(...) 23
#define debug(...) 23
#endif
template <class U, class V> scan_op(pair <U, V>) { return in >> u.first >> u.second; }
template <class T> scan_op(vector <T>) { for (size_t i = 0; i < u.size(); ++i) in >> u[i]; return in; }
template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.first << ", " << u.second << ')'; }
template <size_t i, class T> ostream & print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ")"; else return print_tuple_utils<i + 1, T>(out << (i ? ", " : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple<U...>) { return print_tuple_utils<0, tuple<U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream&>::type operator << (ostream &out, const Con &con) { out << '{'; for (__typeof(con.begin()) it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it; return out << '}'; }
// end of template
const int MAX = 3e5 + 1;
const int BLOCK_SIZE = 550;
struct Query {
int l, r, id;
Query(int l, int r, int id): l(l), r(r), id(id) {}
bool operator < (const Query &ot) { return pair{l / BLOCK_SIZE, r} < pair{ot.l / BLOCK_SIZE, ot.r}; }
};
void process(void) {
int n, q; cin >> n >> q;
vector <int> a(n); cin >> a;
vector <int> c(ALL(a));
sort(ALL(c)); c.erase(unique(ALL(c)), c.end());
REP(i, n) a[i] = lower_bound(ALL(c), a[i]) - c.begin();
vector <int> cnt(c.size());
REP(i, n) ++cnt[a[i]];
vector <int> big;
REP(i, c.size()) if (cnt[i] >= BLOCK_SIZE) big.push_back(i);
vector <Query> queries;
REP(i, q) {
int l, r; cin >> l >> r; --l; --r;
queries.emplace_back(l, r, i);
}
sort(ALL(queries));
fill(ALL(cnt), 0);
vector <int> cnt_cnt(n + 1);
cnt_cnt[0] = c.size();
auto add = [&] (int u, int v) {
--cnt_cnt[cnt[u]];
cnt[u] += v;
++cnt_cnt[cnt[u]];
};
int cl = 0, cr = -1;
vector <long long> res(q);
for (auto [l, r, i]: queries) {
while (cl > l) add(a[--cl], +1);
while (cr < r) add(a[++cr], +1);
while (cl < l) add(a[cl++], -1);
while (cr > r) add(a[cr--], -1);
vector <pair <int, int>> left, right;
int n = 0;
FOR(i, 1, min((int) cnt_cnt.size(), BLOCK_SIZE)) if (cnt_cnt[i]) {
if (n & 1) {
right.emplace_back(i, (cnt_cnt[i] + 1) / 2);
if (cnt_cnt[i] > 1) left.emplace_back(i, cnt_cnt[i] / 2);
} else {
left.emplace_back(i, (cnt_cnt[i] + 1) / 2);
if (cnt_cnt[i] > 1) right.emplace_back(i, cnt_cnt[i] / 2);
}
n += cnt_cnt[i];
}
vector <int> v;
for (int i: big) if (cnt[i] >= BLOCK_SIZE) v.push_back(cnt[i]);
sort(ALL(v));
for (int c: v) (left.size() == right.size() ? left : right).emplace_back(c, 1);
left.insert(left.end(), ALL(right));
n = r - l + 1;
int pref = 0;
for (auto [c, f]: left) {
res[i] += 1LL * f * (c * (c + 1) / 2 + c * (n - c));
res[i] += 1LL * (n - c) * (1LL * pref * f + 1LL * f * (f - 1) / 2 * c);
res[i] -= 1LL * pref * pref * f + 1LL * pref * f * (f - 1) * c + 1LL * c * c * (f - 1) * f * (f + f - 1) / 6;
pref += c * f;
}
}
REP(i, q) cout << res[i] << '\n';
}
int main(void) {
ios_base::sync_with_stdio(false); cin.tie(nullptr); // cout.tie(nullptr);
file("diversity");
// int t; cin >> t; while (t--)
process();
// cerr << "Time elapsed: " << TIME << " s.\n";
return (0^0);
}
Compilation message
diversity.cpp: In function 'int main()':
diversity.cpp:30:61: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
diversity.cpp:116:2: note: in expansion of macro 'file'
116 | file("diversity");
| ^~~~
diversity.cpp:30:94: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
30 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
diversity.cpp:116:2: note: in expansion of macro 'file'
116 | file("diversity");
| ^~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
456 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
456 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Output is correct |
| 2 |
Correct |
0 ms |
456 KB |
Output is correct |
| 3 |
Correct |
0 ms |
348 KB |
Output is correct |
| 4 |
Incorrect |
0 ms |
348 KB |
Output isn't correct |
| 5 |
Halted |
0 ms |
0 KB |
- |
