oj.uz

Submission #410974

# Submission time Handle Problem Language Result Execution time Memory
410974 2021-05-24T02:37:26 Z Kevin_Zhang_TW Ancient Books (IOI17_books) C++17
50 / 100
 139 ms 8048 KB 
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#define pb emplace_back
#define AI(i) begin(i), end(i)
template<class T> bool chmin(T &a, T b) { return b < a && (a = b, true); }
template<class T> bool chmax(T &a, T b) { return a < b && (a = b, true); }
#ifdef KEV
#define DE(args...) kout("[ " + string(#args) + " ] = ", args)
void kout() { cerr << endl; }
template<class T, class ...U> void kout(T a, U ...b) { cerr << a << ' ', kout(b...); }
void debug(auto l, auto r) { while (l != r) cerr << *l << " \n"[next(l)==r], ++l; }
#else
#define DE(...) 0
#define debug(...) 0
#endif
#include "books.h"

long long minimum_walk(std::vector<int> p, int s) {
	int n = p.size();
	ll res = 0;
	for (int i = 0;i < n;++i)
		res += abs(i - p[i]);

	if (res == 0) return 0;

	int L = 0, R = n-1;
	while (p[L] == L) ++L;
	while (p[R] == R) --R;

	chmax(R, s), chmin(L, s);

	auto expand = [&](int &l, int &r) {
		int nl = l, nr = r;
		auto upd = [&](int pos) {
			chmax(nr, p[pos]);
			chmin(nl, p[pos]);
		};
		upd(l), upd(r);

		while (nl < l || r < nr) {
			while (nl < l) {
				upd(--l);
			}
			while (r < nr) {
				upd(++r);
			}
		}

	};

	int l = s, r = s;
	expand(l, r);

	assert(l >= L && r <= R);

	while (L < l || r < R) {
		int costl = 0, costr = 0;
		int l_l = l, l_r = r;
		int r_l = l, r_r = r;

		bool nxt_l = false;
		{
			int &sl = l_l, &sr = l_r;
			while (sl > L && sr <= r) {
				expand(--sl, sr);
				costl += 2;
			}
			nxt_l = sr > r;
		}
		bool nxt_r = false;
		{
			int &sl = r_l, &sr = r_r;
			while (sl >= l && sr < R) {
				expand(sl, ++sr);
				costl += 2;
			}
			nxt_r = sl < l;
		}
		assert(nxt_r == nxt_l);
		if (nxt_r) {
			res += min(costl, costr);
			assert(l_l == r_l);
			assert(l_r == r_r);
		}
		else {
			res += costl + costr;
			assert(l_l == L && r_r == R);
		}
		l = min(l_l, r_l), r = max(l_r, r_r);
	}

	return res;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 116 ms 8032 KB Output is correct
31 Correct 116 ms 8036 KB Output is correct
32 Correct 112 ms 8028 KB Output is correct
33 Correct 122 ms 8040 KB Output is correct
34 Correct 134 ms 8036 KB Output is correct
35 Correct 121 ms 8048 KB Output is correct
36 Correct 116 ms 8044 KB Output is correct
37 Correct 113 ms 8044 KB Output is correct
38 Correct 118 ms 8028 KB Output is correct
39 Correct 116 ms 8048 KB Output is correct
40 Correct 139 ms 8032 KB Output is correct
41 Correct 115 ms 8004 KB Output is correct
42 Correct 115 ms 8048 KB Output is correct
43 Correct 116 ms 8044 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 1 ms 204 KB Output is correct
26 Correct 1 ms 204 KB Output is correct
27 Correct 1 ms 204 KB Output is correct
28 Correct 1 ms 204 KB Output is correct
29 Correct 1 ms 204 KB Output is correct
30 Correct 116 ms 8032 KB Output is correct
31 Correct 116 ms 8036 KB Output is correct
32 Correct 112 ms 8028 KB Output is correct
33 Correct 122 ms 8040 KB Output is correct
34 Correct 134 ms 8036 KB Output is correct
35 Correct 121 ms 8048 KB Output is correct
36 Correct 116 ms 8044 KB Output is correct
37 Correct 113 ms 8044 KB Output is correct
38 Correct 118 ms 8028 KB Output is correct
39 Correct 116 ms 8048 KB Output is correct
40 Correct 139 ms 8032 KB Output is correct
41 Correct 115 ms 8004 KB Output is correct
42 Correct 115 ms 8048 KB Output is correct
43 Correct 116 ms 8044 KB Output is correct
44 Incorrect 1 ms 204 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2744'
45 Halted 0 ms 0 KB -