oj.uz

Submission #283745

# Submission time Handle Problem Language Result Execution time Memory
283745 2020-08-26T06:46:55 Z balbit Ancient Books (IOI17_books) C++14
50 / 100
 374 ms 90616 KB 
#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define pii pair<int, int>
#define f first
#define s second

#define ALL(x) (x).begin(), (x).end()
#define SZ(x) (int)((x).size())
#define pb push_back

#ifdef BALBIT
#define bug(...) cerr<<"#"<<__LINE__<<" "<<#__VA_ARGS__<<": ", _do(__VA_ARGS__)
template <typename T> void _do(T && x) {cerr<<x<<endl;}
template <typename T, typename ...S> void _do(T && x, S&&...y) {cerr<<x<<", "; _do(y...);}
#define IOS()
#else
#define bug(...)
#define IOS() ios::sync_with_stdio(0), cin.tie(0)
#define endl '\n'
#endif
const int maxn = 1e6+5;
bool seen[maxn];
int R[maxn], L[maxn];
bool st[maxn];
bool dv[maxn];
int RR[maxn], LL[maxn];

int par[maxn];
int find(int x) {return x == par[x]? x : par[x] = find(par[x]);}
void mrg(int a, int b) {
	a = find(a); b = find(b);
	if (a == b) return;
	RR[a] = max(RR[a], RR[b]);
	LL[a] = min(LL[a], LL[b]);
	par[b] = a;
}
vector<int> here[maxn];
ll minimum_walk(vector<int> p, int s) {
	memset(seen, 0, sizeof seen);
	int n = SZ(p);
	ll re= 0;
	for (int i = 0; i<n; ++i) {
		// --p[i]; 
		re+= abs(i-p[i]);
	}

	// vector<pair<pii,int> > v;

	for (int i = 0; i<n; ++i) {
		if (!seen[i]) {
			st[i] = 1;
			seen[i] = 1;
			R[i] = L[i] = i;
			for (int x = p[i]; x != i; x = p[x]) seen[x] = 1, R[i] = max(R[i], x);
			for (int x = p[i]; x != i; x = p[x]) R[x] = R[i];
			bug(i, L[i], R[i]);
			LL[i] = L[i]; RR[i] =R[i];
		}
	}
	int nmx = 0;
	re -= 2;

	for (int i = 0; i<n; ++i) {
		nmx = max(nmx, R[i]);

		if (nmx <= i) {
			re += 2;
			dv[i] = 1;
		}

		// if (i == s && nmx > i) {
		// 	int ad = 0;
		// 	for (int j = 1; ; ++j) {
		// 		if (p[i+j] != i+j || p[i-j] != i-j) {
		// 			ad = j; break;
		// 		}
		// 	}
		// 	bug(ad);

		// }
	}
	for (int i = 0; i<n; ++i) par[i] = i;
	vector<pii> stk;
	for (int i = 0; i<n; ++i) {
		if (st[i]) {
			while (!stk.empty() && i > stk.back().s) stk.pop_back();
			int newl = i;
			while (!stk.empty() && R[i] > stk.back().s) {
				mrg(i, stk.back().f);
				bug("merged", i, stk.back().f);
				newl = stk.back().f;
				stk.pop_back();
			}
			stk.pb({newl, R[i]});
		}
	}

	for (int i = 0; i<n; ++i) {
		here[find(i)].pb(i);
		if (st[i]) for (int x = p[i]; x != i; x = p[x])
			here[find(i)].pb(x);
	}

	{
		int l= LL[find(s)], r = RR[find(s)];
		for (int i=l-1; i>=0; --i) {
			if (st[i] && RR[find(i)]>r) {
				int admn = 10000000;
				for (int x : here[find(i)]) {
					admn = min(admn, min(abs(l-x), abs(r-x)));
				}
				re += admn * 2;
				l = LL[find(i)]; r = RR[find(i)];
				i = l-1;
			}
		}
	}

	for (int i = 0; i<n; ++i) {
		if (p[i] == i && i != s) re -= 2;
		else break;
	}
	for (int i = n-1; i>=0; --i) {
		if (p[i] == i && i != s) re -= 2;
		else break;
	}
	return re;
}

#ifdef BALBIT
signed main(){
	IOS();
	bug(minimum_walk({2,4,0,3,1},3));
	// bug(minimum_walk({3,2,1,0},0));
	// bug(minimum_walk({1,0,3,2},0));
}
#endif

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24832 KB Output is correct
2 Correct 15 ms 24832 KB Output is correct
3 Correct 15 ms 24832 KB Output is correct
4 Correct 15 ms 24832 KB Output is correct
5 Correct 16 ms 24832 KB Output is correct
6 Correct 15 ms 24832 KB Output is correct
7 Correct 16 ms 24832 KB Output is correct
8 Correct 20 ms 24832 KB Output is correct
9 Correct 16 ms 24832 KB Output is correct
10 Correct 17 ms 24864 KB Output is correct
11 Correct 15 ms 24832 KB Output is correct
12 Correct 16 ms 24960 KB Output is correct
13 Correct 16 ms 24832 KB Output is correct
14 Correct 16 ms 24832 KB Output is correct
15 Correct 16 ms 24832 KB Output is correct
16 Correct 15 ms 24832 KB Output is correct
17 Correct 15 ms 24832 KB Output is correct
18 Correct 17 ms 24832 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24832 KB Output is correct
2 Correct 15 ms 24832 KB Output is correct
3 Correct 15 ms 24832 KB Output is correct
4 Correct 15 ms 24832 KB Output is correct
5 Correct 16 ms 24832 KB Output is correct
6 Correct 15 ms 24832 KB Output is correct
7 Correct 16 ms 24832 KB Output is correct
8 Correct 20 ms 24832 KB Output is correct
9 Correct 16 ms 24832 KB Output is correct
10 Correct 17 ms 24864 KB Output is correct
11 Correct 15 ms 24832 KB Output is correct
12 Correct 16 ms 24960 KB Output is correct
13 Correct 16 ms 24832 KB Output is correct
14 Correct 16 ms 24832 KB Output is correct
15 Correct 16 ms 24832 KB Output is correct
16 Correct 15 ms 24832 KB Output is correct
17 Correct 15 ms 24832 KB Output is correct
18 Correct 17 ms 24832 KB Output is correct
19 Correct 16 ms 24832 KB Output is correct
20 Correct 16 ms 24832 KB Output is correct
21 Correct 16 ms 24832 KB Output is correct
22 Correct 16 ms 24832 KB Output is correct
23 Correct 16 ms 24832 KB Output is correct
24 Correct 17 ms 24832 KB Output is correct
25 Correct 16 ms 24944 KB Output is correct
26 Correct 16 ms 24832 KB Output is correct
27 Correct 18 ms 24832 KB Output is correct
28 Correct 16 ms 24832 KB Output is correct
29 Correct 16 ms 24832 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24832 KB Output is correct
2 Correct 15 ms 24832 KB Output is correct
3 Correct 15 ms 24832 KB Output is correct
4 Correct 15 ms 24832 KB Output is correct
5 Correct 16 ms 24832 KB Output is correct
6 Correct 15 ms 24832 KB Output is correct
7 Correct 16 ms 24832 KB Output is correct
8 Correct 20 ms 24832 KB Output is correct
9 Correct 16 ms 24832 KB Output is correct
10 Correct 17 ms 24864 KB Output is correct
11 Correct 15 ms 24832 KB Output is correct
12 Correct 16 ms 24960 KB Output is correct
13 Correct 16 ms 24832 KB Output is correct
14 Correct 16 ms 24832 KB Output is correct
15 Correct 16 ms 24832 KB Output is correct
16 Correct 15 ms 24832 KB Output is correct
17 Correct 15 ms 24832 KB Output is correct
18 Correct 17 ms 24832 KB Output is correct
19 Correct 16 ms 24832 KB Output is correct
20 Correct 16 ms 24832 KB Output is correct
21 Correct 16 ms 24832 KB Output is correct
22 Correct 16 ms 24832 KB Output is correct
23 Correct 16 ms 24832 KB Output is correct
24 Correct 17 ms 24832 KB Output is correct
25 Correct 16 ms 24944 KB Output is correct
26 Correct 16 ms 24832 KB Output is correct
27 Correct 18 ms 24832 KB Output is correct
28 Correct 16 ms 24832 KB Output is correct
29 Correct 16 ms 24832 KB Output is correct
30 Correct 374 ms 75752 KB Output is correct
31 Correct 365 ms 75744 KB Output is correct
32 Correct 227 ms 85624 KB Output is correct
33 Correct 255 ms 85496 KB Output is correct
34 Correct 258 ms 85624 KB Output is correct
35 Correct 268 ms 85752 KB Output is correct
36 Correct 274 ms 87548 KB Output is correct
37 Correct 246 ms 90616 KB Output is correct
38 Correct 310 ms 89208 KB Output is correct
39 Correct 262 ms 88320 KB Output is correct
40 Correct 262 ms 80116 KB Output is correct
41 Correct 298 ms 76260 KB Output is correct
42 Correct 291 ms 77036 KB Output is correct
43 Correct 256 ms 84472 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 16 ms 24832 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3586'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 24832 KB Output is correct
2 Correct 15 ms 24832 KB Output is correct
3 Correct 15 ms 24832 KB Output is correct
4 Correct 15 ms 24832 KB Output is correct
5 Correct 16 ms 24832 KB Output is correct
6 Correct 15 ms 24832 KB Output is correct
7 Correct 16 ms 24832 KB Output is correct
8 Correct 20 ms 24832 KB Output is correct
9 Correct 16 ms 24832 KB Output is correct
10 Correct 17 ms 24864 KB Output is correct
11 Correct 15 ms 24832 KB Output is correct
12 Correct 16 ms 24960 KB Output is correct
13 Correct 16 ms 24832 KB Output is correct
14 Correct 16 ms 24832 KB Output is correct
15 Correct 16 ms 24832 KB Output is correct
16 Correct 15 ms 24832 KB Output is correct
17 Correct 15 ms 24832 KB Output is correct
18 Correct 17 ms 24832 KB Output is correct
19 Correct 16 ms 24832 KB Output is correct
20 Correct 16 ms 24832 KB Output is correct
21 Correct 16 ms 24832 KB Output is correct
22 Correct 16 ms 24832 KB Output is correct
23 Correct 16 ms 24832 KB Output is correct
24 Correct 17 ms 24832 KB Output is correct
25 Correct 16 ms 24944 KB Output is correct
26 Correct 16 ms 24832 KB Output is correct
27 Correct 18 ms 24832 KB Output is correct
28 Correct 16 ms 24832 KB Output is correct
29 Correct 16 ms 24832 KB Output is correct
30 Correct 374 ms 75752 KB Output is correct
31 Correct 365 ms 75744 KB Output is correct
32 Correct 227 ms 85624 KB Output is correct
33 Correct 255 ms 85496 KB Output is correct
34 Correct 258 ms 85624 KB Output is correct
35 Correct 268 ms 85752 KB Output is correct
36 Correct 274 ms 87548 KB Output is correct
37 Correct 246 ms 90616 KB Output is correct
38 Correct 310 ms 89208 KB Output is correct
39 Correct 262 ms 88320 KB Output is correct
40 Correct 262 ms 80116 KB Output is correct
41 Correct 298 ms 76260 KB Output is correct
42 Correct 291 ms 77036 KB Output is correct
43 Correct 256 ms 84472 KB Output is correct
44 Incorrect 16 ms 24832 KB 3rd lines differ - on the 1st token, expected: '3304', found: '3586'
45 Halted 0 ms 0 KB -