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Submission #941987

# Submission time Handle Problem Language Result Execution time Memory
941987 2024-03-09T22:44:01 Z beaboss Ancient Books (IOI17_books) C++14
50 / 100
 95 ms 19028 KB 
// Source: https://oj.uz/problem/view/IOI17_books
// 
#include "books.h"


#include "bits/stdc++.h"

using namespace std;

#define s second
#define f first
#define pb push_back

typedef long long ll;

typedef pair<ll, ll> pii;
typedef vector<pii> vpii;

typedef vector<ll> vi;

#define FOR(i, a, b) for (ll i = (a); i<b; i++)

bool ckmin(ll& a, ll b){ return b < a ? a = b, true : false; }

bool ckmax(ll& a, ll b){ return b > a ? a = b, true : false; }

const ll N = 1e6 + 10;
ll ri[N], le[N];
bool vis[N];
vector<int> nxt;
ll n;
ll l,r ;

void extend() {
	ll LL = nxt[l];
	while (LL < l && l > 0) {
		l--;
		LL = min(LL, (ll) nxt[l]);
	}
	ll rr = nxt[r];
	while (r < rr && r < n-1) {
		r++;
		rr = max(rr, (ll)nxt[r]);
	}
}

ll minimum_walk(vector<int> p, int s) {
	n = p.size();
	l = r = s;
	nxt = p;
	ll ans = 0;
	FOR(i, 0, n) ans += abs(i - p[i]);

	ll st = 0;
	for (;st < n;st++) if (p[st] != st) break;
	ll en = n-1;
	for (;en >= 0;en--) if (p[en] != en) break;
	
	if (st >= en) return 0;

	while (l > st || r < en) {
		extend();
		// cout << l << r << endl;
		ll lo = l;
		ll ro = r;

		ll cr = 0;
		while (l == lo && r < en) {
			cr+=2;r++;
			// cout << 'd' << endl;
			extend();
		}
		bool rw = (nxt[r] < l);

		ll fl = l, fr=r;

		l = lo;r = ro;

		ll cl = 0;
		while (r == ro && l > st) {
			// cout << l << endl;
			cl+=2;l--;extend();
		}
		// cout << 'd' << endl;

		bool lw = (nxt[l] > r);

		l = min(l, fl);
		r = max(r, fr);

		// assert(lw ^ rw);
		if (!lw || !rw) {
			ans += cl + cr;
			break;
		}
		ans += min(cl, cr);
	}

	return ans;

}



// int main() {
// 	ios::sync_with_stdio(false);
// 	cin.tie(nullptr);

// 	// FOR(i, 0, 8) {
// 	// mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
// 	// ll n = 100;
// 	// vi here(n);
// 	// FOR(i, 0, n) here[i] = i;
// 	// shuffle(here.begin(), here.end(), rng);
// 	// FOR(i, 0, n) cout << here[i] << ' ';
// 	// cout << endl;


// 	ll res = minimum_walk({0, 2, 4, 5, 1, 6, 3}, 0);
// 	cout << res << endl;

// }

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 600 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 600 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 600 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 71 ms 12052 KB Output is correct
31 Correct 95 ms 18796 KB Output is correct
32 Correct 71 ms 18668 KB Output is correct
33 Correct 77 ms 18796 KB Output is correct
34 Correct 75 ms 18908 KB Output is correct
35 Correct 86 ms 18796 KB Output is correct
36 Correct 74 ms 18792 KB Output is correct
37 Correct 72 ms 18772 KB Output is correct
38 Correct 80 ms 19028 KB Output is correct
39 Correct 94 ms 18772 KB Output is correct
40 Correct 75 ms 18772 KB Output is correct
41 Correct 74 ms 18672 KB Output is correct
42 Correct 73 ms 18792 KB Output is correct
43 Correct 71 ms 18772 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '3304', found: '4076'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 600 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 344 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 1 ms 344 KB Output is correct
17 Correct 1 ms 344 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 1 ms 344 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 1 ms 344 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 71 ms 12052 KB Output is correct
31 Correct 95 ms 18796 KB Output is correct
32 Correct 71 ms 18668 KB Output is correct
33 Correct 77 ms 18796 KB Output is correct
34 Correct 75 ms 18908 KB Output is correct
35 Correct 86 ms 18796 KB Output is correct
36 Correct 74 ms 18792 KB Output is correct
37 Correct 72 ms 18772 KB Output is correct
38 Correct 80 ms 19028 KB Output is correct
39 Correct 94 ms 18772 KB Output is correct
40 Correct 75 ms 18772 KB Output is correct
41 Correct 74 ms 18672 KB Output is correct
42 Correct 73 ms 18792 KB Output is correct
43 Correct 71 ms 18772 KB Output is correct
44 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '3304', found: '4076'
45 Halted 0 ms 0 KB -