#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#define _CRT_SECURE_NO_WARNINGS
#include <bits/stdc++.h>
#include <unordered_map>
//#include <ext/pb_ds/tree_policy.hpp>
//#include <ext/pb_ds/assoc_container.hpp>
using namespace std;
//using namespace __gnu_pbds;
#define FOR(i,start,end) for(int i=start;i<(int)(end);i++)
#define FORE(i,start,end) for(int i=start;i<=(int)end;i++)
#define RFOR(i,start,end) for(int i = start; i>end; i--)
#define RFORE(i,start,end) for(int i = start; i>=end; i--)
#define all(a) a.begin(), a.end()
#define mt make_tuple
#define v vector
#define sf scanf
#define pf printf
#define dvar(x) cout << #x << " := " << x << "\n"
#define darr(x,n) FOR(i,0,n) cout << #x << "[" << i << "]" << " := " << x[i] << "\n"
typedef long long ll;
typedef long double ld;
typedef pair<int, int > pii;
typedef pair<ll, ll> pll;
//template <class T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
template<class T> void minn(T &a, T b) { a = min(a, b); }
template<class T> void maxx(T &a, T b) { a = max(a, b); }
inline void io() {
#ifdef LOCAL_PROJECT
freopen("input.in", "r", stdin); freopen("output.out", "w", stdout);
#else
/* online submission */
#endif
ios_base::sync_with_stdio(false); cin.tie(NULL);
}
/**************************COCI 2016-2017 R5 P5 *************************/
const int MAXN = 500000;
int N, Q, A[MAXN];
int block = 700;
struct Query {
int l, r, idx;
pii ord;
inline void calcOrder() {
ord = { l / block, ((l / block) & 1) ? -r : +r };
}
};
inline bool operator<(const Query &a, const Query &b) {
return a.ord < b.ord;
}
Query qs[MAXN];
int allans[MAXN];
int ans = 0;
int cnt[MAXN];
int L, R;
void add(int x) {
if (cnt[x] == 2)ans--;
else if (cnt[x] == 1) ans++;
cnt[x]++;
}
void remove(int x) {
if (cnt[x] == 2)ans--;
else if (cnt[x] == 3) ans++;
cnt[x]--;
}
void upd(int l, int r) {
while (l < L)
add(A[--L]);
while (L < l)
remove(A[L++]);
while (r < R)
remove(A[R--]);
while (R < r)
add(A[++R]);
}
void pop(int l, int r) {
FORE(i, l, r)
add(A[i]);
L = l, R = r;
}
void compress(int a[], int n) {
v<int> dat;
FOR(i, 0, n) dat.emplace_back(a[i]);
sort(dat.begin(), dat.end());
dat.erase(unique(dat.begin(), dat.end()), dat.end());
FOR(i, 0, n)
a[i] = lower_bound(all(dat), a[i]) - dat.begin();
}
int main() {
io();
cin >> N >> Q;
FOR(i, 0, N) cin >> A[i];
compress(A, N);
FOR(i, 0, Q) {
cin >> qs[i].l >> qs[i].r;
qs[i].l--, qs[i].r--;
qs[i].idx = i;
qs[i].calcOrder();
}
sort(qs, qs + Q);
pop(qs[0].l, qs[0].r);
allans[qs[0].idx] = ans;
FOR(i, 1, Q) {
upd(qs[i].l, qs[i].r);
allans[qs[i].idx] = ans;
}
FOR(i, 0, Q)
cout << allans[i] << "\n";
return 0;
}
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
11 ms |
10104 KB |
Output is correct |
| 2 |
Correct |
11 ms |
10248 KB |
Output is correct |
| 3 |
Correct |
11 ms |
10248 KB |
Output is correct |
| 4 |
Correct |
14 ms |
10400 KB |
Output is correct |
| 5 |
Correct |
119 ms |
12768 KB |
Output is correct |
| 6 |
Correct |
127 ms |
14188 KB |
Output is correct |
| 7 |
Correct |
295 ms |
18532 KB |
Output is correct |
| 8 |
Correct |
443 ms |
24524 KB |
Output is correct |
| 9 |
Correct |
642 ms |
32460 KB |
Output is correct |
| 10 |
Correct |
838 ms |
41924 KB |
Output is correct |
