oj.uz

Submission #790601

# Submission time Handle Problem Language Result Execution time Memory
790601 2023-07-22T22:31:32 Z FEDIKUS Ancient Books (IOI17_books) C++17
100 / 100
 179 ms 31592 KB 
#include "books.h"
#include<bits/stdc++.h>
 
using ll = long long;
using namespace std;
 
const int maxn=1e6+10;
 
int n;
int mini[maxn];
int maxi[maxn];
bool bio[maxn];
int dsu[maxn],siz[maxn];
 
int cale(int a){return a==dsu[a] ? a:cale(dsu[a]);}
void join(int a,int b){
	a=cale(a); b=cale(b);
	if(a==b) return;
	if(siz[a]<siz[b]) swap(a,b);
	dsu[b]=a;
	siz[a]+=siz[b];
	maxi[a]=max(maxi[a],maxi[b]);
	mini[a]=min(mini[a],mini[b]);
}
void init(){
	for(int i=0;i<n;i++){dsu[i]=i; siz[i]=1; maxi[i]=i; mini[i]=i;}
}
 
ll minimum_walk(vector<int> p, int s) {
	n=p.size();
	init();
	ll ret=0;
	int imal=n,imar=-1;
	for(int i=0;i<n;i++){
		if(p[i]!=i) imal=min(imal,i);
		if(p[i]!=i) imar=i;
		ret+=abs(p[i]-i);
		if(bio[i]) continue;
		int tren=i;
		while(!bio[tren]){
			bio[tren]=true;
			join(tren,p[tren]);
			tren=p[tren];
		}
	}
	imal=min(imal,s);
	imar=max(imar,s);
	int l=s,r=s;
	int tl=mini[cale(s)],tr=maxi[cale(s)];
	int dodaol=0,dodaor=0;
	while(l!=imal || r!=imar){
		bool pl=false,pr=false;
		if(l!=tl || r!=tr){
			if(l!=tl){
				l--;
				tl=min(tl,mini[cale(l)]);
				tr=max(tr,maxi[cale(l)]);
			}
			if(r!=tr){
				r++;
				tl=min(tl,mini[cale(r)]);
				tr=max(tr,maxi[cale(r)]);
			}
			continue;
		}

		while(l>imal && maxi[cale(l-1)]<=r){
			l--;
			if(l<tl){
				ret+=2;
				dodaol++;
			}
			tl=min(tl,mini[cale(l)]);
		}

		while(r<imar && mini[cale(r+1)]>=l){
			r++;
			if(r>tr){
				ret+=2;
				dodaor++;
			}
			tr=max(tr,maxi[cale(r)]);
		}

		if(l==imal && r==imar) break;
		
		ret-=2*max(dodaol-int(r>=tr),dodaor-int(l<=tl));
		l--;
		tl=min(tl,mini[cale(l)]);
		tr=max(tr,maxi[cale(l)]);
		dodaol=0;
		dodaor=0;
	}
	return ret;
}

Compilation message

books.cpp: In function 'll minimum_walk(std::vector<int>, int)':
books.cpp:52:8: warning: unused variable 'pl' [-Wunused-variable]
   52 |   bool pl=false,pr=false;
      |        ^~
books.cpp:52:17: warning: unused variable 'pr' [-Wunused-variable]
   52 |   bool pl=false,pr=false;
      |                 ^~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 179 ms 24704 KB Output is correct
31 Correct 174 ms 24708 KB Output is correct
32 Correct 91 ms 24696 KB Output is correct
33 Correct 94 ms 24696 KB Output is correct
34 Correct 94 ms 24692 KB Output is correct
35 Correct 99 ms 24696 KB Output is correct
36 Correct 99 ms 24752 KB Output is correct
37 Correct 94 ms 24688 KB Output is correct
38 Correct 95 ms 24692 KB Output is correct
39 Correct 109 ms 24708 KB Output is correct
40 Correct 99 ms 24700 KB Output is correct
41 Correct 120 ms 24700 KB Output is correct
42 Correct 110 ms 24696 KB Output is correct
43 Correct 102 ms 24692 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 312 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 1 ms 340 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 0 ms 340 KB Output is correct
3 Correct 0 ms 340 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 0 ms 340 KB Output is correct
6 Correct 0 ms 340 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 0 ms 340 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 0 ms 340 KB Output is correct
12 Correct 0 ms 340 KB Output is correct
13 Correct 0 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 340 KB Output is correct
16 Correct 0 ms 340 KB Output is correct
17 Correct 0 ms 340 KB Output is correct
18 Correct 0 ms 340 KB Output is correct
19 Correct 0 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 0 ms 340 KB Output is correct
22 Correct 0 ms 340 KB Output is correct
23 Correct 1 ms 340 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 0 ms 340 KB Output is correct
27 Correct 1 ms 340 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 0 ms 340 KB Output is correct
30 Correct 179 ms 24704 KB Output is correct
31 Correct 174 ms 24708 KB Output is correct
32 Correct 91 ms 24696 KB Output is correct
33 Correct 94 ms 24696 KB Output is correct
34 Correct 94 ms 24692 KB Output is correct
35 Correct 99 ms 24696 KB Output is correct
36 Correct 99 ms 24752 KB Output is correct
37 Correct 94 ms 24688 KB Output is correct
38 Correct 95 ms 24692 KB Output is correct
39 Correct 109 ms 24708 KB Output is correct
40 Correct 99 ms 24700 KB Output is correct
41 Correct 120 ms 24700 KB Output is correct
42 Correct 110 ms 24696 KB Output is correct
43 Correct 102 ms 24692 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 0 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 312 KB Output is correct
49 Correct 1 ms 340 KB Output is correct
50 Correct 1 ms 340 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 1 ms 340 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Correct 1 ms 340 KB Output is correct
56 Correct 1 ms 340 KB Output is correct
57 Correct 1 ms 340 KB Output is correct
58 Correct 1 ms 340 KB Output is correct
59 Correct 1 ms 340 KB Output is correct
60 Correct 1 ms 340 KB Output is correct
61 Correct 1 ms 340 KB Output is correct
62 Correct 1 ms 340 KB Output is correct
63 Correct 1 ms 340 KB Output is correct
64 Correct 96 ms 31468 KB Output is correct
65 Correct 92 ms 31464 KB Output is correct
66 Correct 99 ms 31464 KB Output is correct
67 Correct 95 ms 31472 KB Output is correct
68 Correct 10 ms 3256 KB Output is correct
69 Correct 9 ms 3284 KB Output is correct
70 Correct 9 ms 3284 KB Output is correct
71 Correct 12 ms 3284 KB Output is correct
72 Correct 9 ms 3336 KB Output is correct
73 Correct 10 ms 3252 KB Output is correct
74 Correct 92 ms 31472 KB Output is correct
75 Correct 92 ms 31460 KB Output is correct
76 Correct 101 ms 31476 KB Output is correct
77 Correct 94 ms 31468 KB Output is correct
78 Correct 95 ms 31476 KB Output is correct
79 Correct 94 ms 31464 KB Output is correct
80 Correct 80 ms 31464 KB Output is correct
81 Correct 95 ms 31464 KB Output is correct
82 Correct 85 ms 31484 KB Output is correct
83 Correct 94 ms 31400 KB Output is correct
84 Correct 95 ms 31480 KB Output is correct
85 Correct 94 ms 31464 KB Output is correct
86 Correct 91 ms 31592 KB Output is correct
87 Correct 89 ms 31472 KB Output is correct
88 Correct 92 ms 31464 KB Output is correct
89 Correct 114 ms 31464 KB Output is correct
90 Correct 106 ms 31436 KB Output is correct
91 Correct 93 ms 31460 KB Output is correct
92 Correct 94 ms 31464 KB Output is correct