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Submission #927141

# Submission time Handle Problem Language Result Execution time Memory
927141 2024-02-14T10:04:18 Z vjudge1 Martian DNA (BOI18_dna) C++17
100 / 100
 69 ms 14976 KB 
#pragma GCC optimize("O3", "unroll-loops") // "Ofast" 	
#pragma GCC target("avx2", "bmi", "bmi2", "lzcnt", "popcnt") 

#include <bits/stdc++.h>

#define int long long
#define vt vector
#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int)(x).size()
#define f first
#define s second
#define dbg(x) cerr << #x << " = " << x << '\n'
#define bit(x, i) ((x) >> (i) & 1)

using namespace std;
using ll = long long;
using ld = long double;
using pii = pair<int, int>;

const int N = 1e6 + 5, mod = 1e9 + 7;
const ll inf = 1e18 + 7;
const ld eps = 1e-6;

ll add (ll a, ll b) {
	a += b;
	if (a < 0) a += mod;
	if (a >= mod) a -= mod;
	return a;
}

ll mul (ll a, ll b) {
	a *= b;
	if (a >= mod) a %= mod;
	return a;
}   

int n, k, R, a[N], b[N], cnt[N], t[4 * N];

void build (int v = 1, int tl = 0, int tr = k - 1) {
	if (tl == tr) {
		t[v] = b[tl];
		return;
	}
	int tm = tl + tr >> 1;
	build(v << 1, tl, tm); build(v << 1 | 1, tm + 1, tr);
	t[v] = max(t[v << 1], t[v << 1 | 1]);
}

void upd (int pos, int x, int v = 1, int tl = 0, int tr = k - 1) {
	if (tl == tr) {
		t[v] += x;
		return;
	}
	int tm = tl + tr >> 1;
	if (pos <= tm) upd(pos, x, v << 1, tl, tm);
	else upd(pos, x, v << 1 | 1, tm + 1, tr);
	t[v] = max(t[v << 1], t[v << 1 | 1]);	
}

void solve () {
	cin >> n >> k >> R;
	for (int i = 1; i <= n; i++) cin >> a[i], cnt[a[i]]++;
	for (int i = 1; i <= R; i++) {
		int x, y;
		cin >> x >> y;
		b[x] = y;
	}
	for (int i = 0; i < k; i++) {
		if (cnt[i] < b[i]) cout << "impossible\n", exit(0);
	}      
	build();
	int l = 1, r = 1, ans = inf;
	upd(a[1], -1);
	while (l <= n) {
		while (r <= n && t[1] > 0) r++, upd(a[r], -1);
		if (t[1] == 0) ans = min(ans, r - l + 1);
		upd(a[l], 1), l++; 
	}
	cout << ans;
	cout << '\n';
}

bool testcases = 0;

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	int test = 1;
	if (testcases) cin >> test;
	for (int cs = 1; cs <= test; cs++) {
		solve();
	}
}

Compilation message

dna.cpp: In function 'void build(long long int, long long int, long long int)':
dna.cpp:45:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   45 |  int tm = tl + tr >> 1;
      |           ~~~^~~~
dna.cpp: In function 'void upd(long long int, long long int, long long int, long long int, long long int)':
dna.cpp:55:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   55 |  int tm = tl + tr >> 1;
      |           ~~~^~~~

Subtask #1
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 6488 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 1 ms 6492 KB Output is correct
4 Correct 1 ms 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6488 KB Output is correct

Subtask #2
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 6492 KB Output is correct
2 Correct 1 ms 6492 KB Output is correct
3 Correct 2 ms 6492 KB Output is correct
4 Correct 2 ms 8540 KB Output is correct
5 Correct 2 ms 6492 KB Output is correct
6 Correct 1 ms 6492 KB Output is correct
7 Correct 1 ms 6492 KB Output is correct
8 Correct 1 ms 6492 KB Output is correct
9 Correct 1 ms 6492 KB Output is correct
10 Correct 1 ms 6608 KB Output is correct
11 Correct 1 ms 6492 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 1 ms 6492 KB Output is correct
14 Correct 1 ms 6744 KB Output is correct
15 Correct 1 ms 6492 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 8540 KB Output is correct
2 Correct 10 ms 8540 KB Output is correct
3 Correct 13 ms 8540 KB Output is correct
4 Correct 12 ms 8540 KB Output is correct
5 Correct 53 ms 10844 KB Output is correct
6 Correct 16 ms 8540 KB Output is correct
7 Correct 9 ms 8660 KB Output is correct
8 Correct 65 ms 12892 KB Output is correct
9 Correct 42 ms 10844 KB Output is correct
10 Correct 15 ms 8536 KB Output is correct
11 Correct 1 ms 6488 KB Output is correct
12 Correct 1 ms 6492 KB Output is correct
13 Correct 2 ms 6492 KB Output is correct
14 Correct 2 ms 8540 KB Output is correct
15 Correct 2 ms 6492 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 6492 KB Output is correct
18 Correct 1 ms 6492 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 1 ms 6492 KB Output is correct
22 Correct 1 ms 6492 KB Output is correct
23 Correct 1 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct

Subtask #4
32.0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 61 ms 12924 KB Output is correct
2 Correct 55 ms 13144 KB Output is correct
3 Correct 54 ms 12892 KB Output is correct
4 Correct 9 ms 8540 KB Output is correct
5 Correct 21 ms 10588 KB Output is correct
6 Correct 69 ms 14976 KB Output is correct
7 Correct 42 ms 10844 KB Output is correct
8 Correct 57 ms 12880 KB Output is correct
9 Correct 12 ms 8540 KB Output is correct
10 Correct 10 ms 8536 KB Output is correct
11 Correct 13 ms 8668 KB Output is correct
12 Correct 12 ms 8540 KB Output is correct
13 Correct 50 ms 10844 KB Output is correct
14 Correct 16 ms 8540 KB Output is correct
15 Correct 9 ms 8540 KB Output is correct
16 Correct 60 ms 12928 KB Output is correct
17 Correct 42 ms 10844 KB Output is correct
18 Correct 15 ms 8540 KB Output is correct
19 Correct 1 ms 6492 KB Output is correct
20 Correct 1 ms 6492 KB Output is correct
21 Correct 2 ms 6492 KB Output is correct
22 Correct 2 ms 8540 KB Output is correct
23 Correct 2 ms 6492 KB Output is correct
24 Correct 1 ms 6492 KB Output is correct
25 Correct 1 ms 6492 KB Output is correct
26 Correct 1 ms 6492 KB Output is correct
27 Correct 1 ms 6492 KB Output is correct
28 Correct 1 ms 6492 KB Output is correct
29 Correct 1 ms 6744 KB Output is correct
30 Correct 1 ms 6492 KB Output is correct
31 Correct 1 ms 6492 KB Output is correct
32 Correct 1 ms 6492 KB Output is correct
33 Correct 1 ms 6492 KB Output is correct