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Submission #927134

# Submission time Handle Problem Language Result Execution time Memory
927134 2024-02-14T09:57:18 Z vjudge1 Martian DNA (BOI18_dna) C++17
0 / 100
 55 ms 10872 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], t[4 * N];

void build (int v = 1, int tl = 1, int tr = k) {
	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 = 1, int tr = k) {
	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], a[i]++;
	for (int i = 1; i <= R; i++) {
		int x, y;
		cin >> x >> y, x++;
		b[x] = y;
	}      
	build();
	int l = 1, r = 1, ans = inf;
	while (l <= r && r <= n) {
		while (r <= n && t[1] > 0) upd(a[r], -1), r++;
		if (t[1] == 0) ans = min(ans, r - l);
		upd(a[l], 1), l++; 
	}
	if (t[1] == 0) ans = min(ans, r - l);
	if (ans == inf) cout << "impossible\n", exit(0);
	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
0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4440 KB Output is correct
2 Correct 1 ms 4440 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Incorrect 1 ms 4444 KB Output isn't correct
7 Halted 0 ms 0 KB -

Subtask #2
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 6492 KB Output is correct
5 Correct 1 ms 6492 KB Output is correct
6 Correct 2 ms 6492 KB Output is correct
7 Correct 1 ms 4524 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4440 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Incorrect 1 ms 4444 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 14 ms 6616 KB Output is correct
2 Correct 10 ms 6492 KB Output is correct
3 Correct 12 ms 6492 KB Output is correct
4 Correct 11 ms 6492 KB Output is correct
5 Correct 42 ms 8796 KB Output is correct
6 Correct 12 ms 6616 KB Output is correct
7 Correct 16 ms 6488 KB Output is correct
8 Correct 48 ms 10844 KB Output is correct
9 Correct 34 ms 6488 KB Output is correct
10 Correct 14 ms 6492 KB Output is correct
11 Correct 1 ms 6492 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 6492 KB Output is correct
15 Correct 2 ms 6488 KB Output is correct
16 Correct 1 ms 6492 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4440 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Incorrect 1 ms 4444 KB Output isn't correct
23 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 53 ms 8796 KB Output is correct
2 Correct 46 ms 8796 KB Output is correct
3 Correct 45 ms 8792 KB Output is correct
4 Correct 9 ms 6488 KB Output is correct
5 Correct 41 ms 8660 KB Output is correct
6 Correct 55 ms 10704 KB Output is correct
7 Correct 27 ms 6492 KB Output is correct
8 Correct 43 ms 8792 KB Output is correct
9 Correct 12 ms 6616 KB Output is correct
10 Correct 10 ms 6492 KB Output is correct
11 Correct 12 ms 6488 KB Output is correct
12 Correct 11 ms 6492 KB Output is correct
13 Correct 42 ms 8820 KB Output is correct
14 Correct 12 ms 6492 KB Output is correct
15 Correct 16 ms 6492 KB Output is correct
16 Correct 49 ms 10872 KB Output is correct
17 Correct 34 ms 6492 KB Output is correct
18 Correct 15 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 2 ms 6492 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 4440 KB Output is correct
26 Correct 1 ms 4440 KB Output is correct
27 Correct 1 ms 4444 KB Output is correct
28 Correct 1 ms 4444 KB Output is correct
29 Correct 1 ms 4444 KB Output is correct
30 Incorrect 1 ms 4444 KB Output isn't correct
31 Halted 0 ms 0 KB -