Submission #391010

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
391010	2021-04-17T14:59:10 Z	alishahali1382	Ancient Books (IOI17_books)	C++14	50 / 100	167 ms	15948 KB

books

#include "books.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
#define debug(x) {cerr<<#x<<"="<<x<<"\n";}
#define debug2(x, y) {cerr<<#x<<", "<<#y<<" = "<<x<<", "<<y<<"\n";}
#define debugp(p) {cerr<<#p<<"={"<<p.first<<", "<<p.second<<"}\n";}
#define pb push_back
#define all(x) x.begin(), x.end()

const int inf=1000000100;
const int MAXN=1000010;

ll ans; // :)
int n, m, k, s, L, R;
int P[MAXN], ps[MAXN];
int mn[MAXN], mx[MAXN];

pii fix(int l, int r, int L, int R){
	int ll=min({l, mn[l], mn[r]}), rr=max({r, mx[l], mx[r]});
	while (ll<l || r<rr){
		if (l<L || R<r) break ;
		if (ll<l){
			l--;
			ll=min(ll, mn[l]);
			rr=max(rr, mx[l]);
		}
		if (r<rr){
			r++;
			ll=min(ll, mn[r]);
			rr=max(rr, mx[r]);
		}
	}
	return {l, r};
}

ll minimum_walk(vector<int> _p, int s){
	n=_p.size();
	for (int i=0; i<n; i++){
		P[i]=_p[i];
		ans+=abs(i-P[i]);
		ps[min(i, P[i])]++;
		ps[max(i, P[i])]--;
	}
	if (!ans) return 0;
	L=0;
	R=n-1;
	while (P[L]==L) L++;
	while (P[R]==R) R--;
	for (int i=1; i<=R; i++) ps[i]+=ps[i-1];
	if (s<=L || R<=s){
		for (int i=L; i+1<=R; i++) if (!ps[i]) ans+=2;
		if (s<L) ans+=2*(L-s);
		if (R<s) ans+=2*(s-R);
		return ans;
	}
	for (int i=L; i<R; i++){
		vector<int> vec;
		int v=i;
		while (1){
			vec.pb(v);
			v=P[v];
			if (v==i) break ;
		}
		mn[i]=mx[i]=i;
		for (int v:vec){
			mn[i]=min(mn[i], v);
			mx[i]=max(mx[i], v);
		}
		for (int v:vec){
			mn[v]=mn[i];
			mx[v]=mx[i];
		}
	}
	pii p=fix(s, s, L, R);
	int tl=p.first, tr=p.second;
	for (int i=L; i<tl; i++) if (!ps[i]){
		ans+=2;
		L=i+1;
	}
	for (int i=R-1; i>=tr; i--) if (!ps[i]){
		ans+=2;
		R=i;
	}
	// debug(ans)
	while (tr-tl!=R-L){
		int l=tl, r=tr;
		int cl=0, cr=0;
		while (L<l){
			cl+=2;
			pii p=fix(--l, tr, L, tr);
			l=p.first;
			if (tr<p.second) break ;
		}
		while (r<R){
			cr+=2;
			pii p=fix(tl, ++r, tl, R);
			r=p.second;
			if (p.first<tl) break ;
		}
		ans+=min(cl, cr);
		tl=l;
		tr=r;
	}
	
	return ans;
}

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	208 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	208 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	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	332 KB	Output is correct
24	Correct	1 ms	332 KB	Output is correct
25	Correct	1 ms	420 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	1 ms	332 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	208 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	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	332 KB	Output is correct
24	Correct	1 ms	332 KB	Output is correct
25	Correct	1 ms	420 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	141 ms	15948 KB	Output is correct
31	Correct	152 ms	15868 KB	Output is correct
32	Correct	147 ms	15940 KB	Output is correct
33	Correct	143 ms	15940 KB	Output is correct
34	Correct	139 ms	15860 KB	Output is correct
35	Correct	167 ms	15856 KB	Output is correct
36	Correct	141 ms	15868 KB	Output is correct
37	Correct	157 ms	15864 KB	Output is correct
38	Correct	151 ms	15856 KB	Output is correct
39	Correct	142 ms	15940 KB	Output is correct
40	Correct	136 ms	15940 KB	Output is correct
41	Correct	140 ms	15872 KB	Output is correct
42	Correct	138 ms	15940 KB	Output is correct
43	Correct	139 ms	15872 KB	Output is correct

Subtask #4

0 / 20.0

#	Verdict	Execution time	Memory	Grader output
1	Incorrect	1 ms	336 KB	3rd lines differ - on the 1st token, expected: '3304', found: '3306'
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	208 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	332 KB	Output is correct
20	Correct	1 ms	332 KB	Output is correct
21	Correct	1 ms	332 KB	Output is correct
22	Correct	1 ms	332 KB	Output is correct
23	Correct	1 ms	332 KB	Output is correct
24	Correct	1 ms	332 KB	Output is correct
25	Correct	1 ms	420 KB	Output is correct
26	Correct	1 ms	332 KB	Output is correct
27	Correct	1 ms	332 KB	Output is correct
28	Correct	1 ms	332 KB	Output is correct
29	Correct	1 ms	332 KB	Output is correct
30	Correct	141 ms	15948 KB	Output is correct
31	Correct	152 ms	15868 KB	Output is correct
32	Correct	147 ms	15940 KB	Output is correct
33	Correct	143 ms	15940 KB	Output is correct
34	Correct	139 ms	15860 KB	Output is correct
35	Correct	167 ms	15856 KB	Output is correct
36	Correct	141 ms	15868 KB	Output is correct
37	Correct	157 ms	15864 KB	Output is correct
38	Correct	151 ms	15856 KB	Output is correct
39	Correct	142 ms	15940 KB	Output is correct
40	Correct	136 ms	15940 KB	Output is correct
41	Correct	140 ms	15872 KB	Output is correct
42	Correct	138 ms	15940 KB	Output is correct
43	Correct	139 ms	15872 KB	Output is correct
44	Incorrect	1 ms	336 KB	3rd lines differ - on the 1st token, expected: '3304', found: '3306'
45	Halted	0 ms	0 KB	-