oj.uz

Submission #928249

# Submission time Handle Problem Language Result Execution time Memory
928249 2024-02-16T06:10:07 Z shidou26 Poklon (COCI17_poklon) C++14
140 / 140
 1614 ms 23812 KB 
#include <bits/stdc++.h> 
using namespace std;

#define ll long long
#define ull unsigned long long
#define ii pair<int, int>
#define mp make_pair
#define all(v) v.begin(), v.end()
#define sz(v) (int)v.size()
#define file(name) if(fopen(name".INP", "r")) {freopen(name".INP", "r", stdin); freopen(name".OUT", "w", stdout);}
#define usaco(name) if(fopen(name".in", "r")) {freopen(name".in", "r", stdin); freopen(name".out", "w", stdout);}

#define el "\n"
#define fi first
#define se second

template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }

const int N = 5e5 + 12;

struct query {
	int l, r, ind;
};

int n, q, bz = 700, curleft, curright, cur = 0;
int a[N], ans[N], cnt[N];
vector<int> b, v;
query qry[N];

bool cmp(query x, query y) {
	return (mp(x.l / bz, x.r) < mp(y.l / bz, y.r));
}

void add(int idx) {
	if(idx == 0) return;
	int x = a[idx];
	if(cnt[x] == 2) cur--;
	cnt[x]++;
	if(cnt[x] == 2) cur++;
}

void remove(int idx) {
	if(idx == 0) return;
	int x = a[idx];
	if(cnt[x] == 2) cur--;
	cnt[x]--;
	if(cnt[x] == 2) cur++;
}

void mo(int idx) {
	int left = qry[idx].l, right = qry[idx].r;

	while(curleft < left) {
		remove(curleft);
		curleft++;
	}

	while(left < curleft) {
		curleft--;
		add(curleft);
	}

	while(right < curright) {
		remove(curright);
		curright--;
	}

	while(curright < right) {
		curright++;
		add(curright);
	}
}

void solve() { 
	cin >> n >> q;

	for(int i = 1; i <= n; i++) {
		cin >> a[i];
		b.push_back(a[i]);
	}    

	sort(all(b));
	b.resize(unique(all(b)) - b.begin());

	for(int i = 1; i <= n; i++)
		a[i] = lower_bound(all(b), a[i]) - b.begin() + 1;

	for(int i = 1; i <= q; i++)
		cin >> qry[i].l >> qry[i].r, 
		qry[i].ind = i;

	sort(qry + 1, qry + 1 + q, cmp);

	for(int i = 1; i <= q; i++) {
		mo(i);
		ans[qry[i].ind] = cur;
	}

	for(int i = 1; i <= q; i++)
		cout << ans[i] << el;
}
 
signed main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    solve();
    cerr << el<< "Time elapsed: " << (1000.0 * clock() / CLOCKS_PER_SEC) << "ms.\n";
    return 0;
}

/*
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*/

Subtask #1
140.0 / 140.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6648 KB Output is correct
2 Correct 2 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 7 ms 6748 KB Output is correct
5 Correct 155 ms 10796 KB Output is correct
6 Correct 157 ms 10792 KB Output is correct
7 Correct 413 ms 15456 KB Output is correct
8 Correct 764 ms 18272 KB Output is correct
9 Correct 1159 ms 21184 KB Output is correct
10 Correct 1614 ms 23812 KB Output is correct