oj.uz

Submission #1030573

# Submission time Handle Problem Language Result Execution time Memory
1030573 2024-07-22T07:00:48 Z hirayuu_oj Ancient Books (IOI17_books) C++17
100 / 100
 312 ms 41396 KB 
#include "books.h"
#include<bits/stdc++.h>
using namespace std;
#define rep(i,n) for(int i=0; i<(n); i++)
#define rng(i,l,r) for(int i=(l); i<(r); i++)
#define all(x) x.begin(),x.end()
using ll=long long;
const int INF=INT_MAX>>1;

struct SegTree{

	using T=pair<int,int>;
	inline T op(T x,T y){
		return {min(x.first,y.first),max(x.second,y.second)};
	}
	inline T e(){
		return {INF,-INF};
	}

	vector<T> tree;
	int size;
	SegTree(int sz):size(sz){
		tree.resize(size*2,e());
	}
	inline T get(int pos){
		return tree[pos+size];
	}
	inline void set(int pos,T val){
		pos+=size;
		tree[pos]=val;
		pos>>=1;
		while(pos>=1){
			tree[pos]=op(tree[pos*2],tree[pos*2+1]);
			pos>>=1;
		}
	}
	T prod(int lf,int ri){
		lf+=size;
		ri+=size;
		T rl=e();
		T rr=e();
		while(lf<ri){
			if(lf&1){
				rl=op(rl,tree[lf]);
				lf++;
			}
			if(ri&1){
				ri--;
				rr=op(tree[ri],rr);
			}
			lf>>=1;
			ri>>=1;
		}
		return op(rl,rr);
	}
};

long long minimum_walk(std::vector<int> p, int s) {
	int n=p.size();
	vector<int> vis(n,-1);
	vector<pair<int,int>> wide;
	int cnt=0;
	ll ans=0;
	rep(i,n){
		if(vis[i]>=0)continue;
		if(p[i]==i&&i!=s)continue;
		int lf=i;
		int ri=i;
		int pos=i;
		while(vis[p[pos]]==-1){
			ans+=abs(pos-p[pos]);
			pos=p[pos];
			vis[pos]=cnt;
			lf=min(lf,pos);
			ri=max(ri,pos);
		}
		cnt++;
		wide.emplace_back(lf,ri);
	}
	int sl,sr;
	{
		vector<pair<int,int>> seg=wide;
		sort(all(seg));
		vector<pair<int,int>> re={seg[0]};
		rng(i,1,seg.size()){
			if(seg[i].first<=re.back().second){
				re.back().second=max(re.back().second,seg[i].second);
			}
			else{
				re.emplace_back(seg[i]);
			}
		}
		rep(i,re.size()-1){
			ans+=2*(re[i+1].first-re[i].second);
		}
		for(auto i:re){
			if(i.first<=s&&s<=i.second){
				sl=i.first;
				sr=i.second;
				break;
			}
		}
	}
	vector<int> dist(cnt,INF);
	dist[vis[s]]=0;
	SegTree seg(n);
	rng(i,sl,sr+1){
		if(vis[i]!=-1){
			seg.set(i,{i,i});
		}
	}
	priority_queue<pair<int,int>,vector<pair<int,int>>,greater<pair<int,int>>> pq;
	pq.push({0,vis[s]});
	while(!pq.empty()){
		int dis,pos;
		tie(dis,pos)=pq.top();
		pq.pop();
		if(dist[pos]!=dis)continue;
		int lf,ri;
		tie(lf,ri)=wide[pos];
		while(true){
			int nxt=seg.prod(lf+1,ri).first;
			if(nxt>n)break;
			seg.set(nxt,seg.e());
			if(dist[vis[nxt]]>dis){
				dist[vis[nxt]]=dis;
				pq.push({dist[vis[nxt]],vis[nxt]});
			}
		}
		int nxt;
		nxt=seg.prod(0,lf).second;
		if(0<=nxt){
			if(dist[vis[nxt]]>dis+abs(nxt-lf)){
				dist[vis[nxt]]=dis+abs(nxt-lf);
				pq.push({dist[vis[nxt]],vis[nxt]});
			}
		}
		nxt=seg.prod(ri+1,n).first;
		if(nxt<n){
			if(dist[vis[nxt]]>dis+abs(nxt-ri)){
				dist[vis[nxt]]=dis+abs(nxt-ri);
				pq.push({dist[vis[nxt]],vis[nxt]});
			}
		}
	}
	rep(i,cnt){
		if(wide[i].first==sl){
			ans+=dist[i]*2;
			break;
		}
	}
	return ans;
}

Compilation message

books.cpp: In function 'long long int minimum_walk(std::vector<int>, int)':
books.cpp:5:36: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    5 | #define rng(i,l,r) for(int i=(l); i<(r); i++)
      |                                    ^
books.cpp:85:3: note: in expansion of macro 'rng'
   85 |   rng(i,1,seg.size()){
      |   ^~~
books.cpp:4:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    4 | #define rep(i,n) for(int i=0; i<(n); i++)
      |                                ^
books.cpp:93:3: note: in expansion of macro 'rep'
   93 |   rep(i,re.size()-1){
      |   ^~~
books.cpp:5:36: warning: 'sr' may be used uninitialized in this function [-Wmaybe-uninitialized]
    5 | #define rng(i,l,r) for(int i=(l); i<(r); i++)
      |                                    ^
books.cpp:80:9: note: 'sr' was declared here
   80 |  int sl,sr;
      |         ^~
books.cpp:80:6: warning: 'sl' may be used uninitialized in this function [-Wmaybe-uninitialized]
   80 |  int sl,sr;
      |      ^~

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 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 432 KB Output is correct
17 Correct 1 ms 348 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 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 432 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 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 1 ms 348 KB Output is correct
25 Correct 0 ms 384 KB Output is correct
26 Correct 0 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 432 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 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 432 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 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 1 ms 348 KB Output is correct
25 Correct 0 ms 384 KB Output is correct
26 Correct 0 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 432 KB Output is correct
30 Correct 240 ms 34388 KB Output is correct
31 Correct 238 ms 34544 KB Output is correct
32 Correct 77 ms 34412 KB Output is correct
33 Correct 85 ms 36816 KB Output is correct
34 Correct 97 ms 36732 KB Output is correct
35 Correct 88 ms 36892 KB Output is correct
36 Correct 87 ms 36308 KB Output is correct
37 Correct 78 ms 34824 KB Output is correct
38 Correct 79 ms 34660 KB Output is correct
39 Correct 82 ms 34544 KB Output is correct
40 Correct 83 ms 34548 KB Output is correct
41 Correct 127 ms 34392 KB Output is correct
42 Correct 90 ms 34388 KB Output is correct
43 Correct 220 ms 41396 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 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 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 344 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 1 ms 344 KB Output is correct
16 Correct 0 ms 436 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 344 KB Output is correct

Subtask #5
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 436 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 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 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 1 ms 344 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 432 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 1 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 1 ms 348 KB Output is correct
25 Correct 0 ms 384 KB Output is correct
26 Correct 0 ms 604 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 0 ms 432 KB Output is correct
30 Correct 240 ms 34388 KB Output is correct
31 Correct 238 ms 34544 KB Output is correct
32 Correct 77 ms 34412 KB Output is correct
33 Correct 85 ms 36816 KB Output is correct
34 Correct 97 ms 36732 KB Output is correct
35 Correct 88 ms 36892 KB Output is correct
36 Correct 87 ms 36308 KB Output is correct
37 Correct 78 ms 34824 KB Output is correct
38 Correct 79 ms 34660 KB Output is correct
39 Correct 82 ms 34544 KB Output is correct
40 Correct 83 ms 34548 KB Output is correct
41 Correct 127 ms 34392 KB Output is correct
42 Correct 90 ms 34388 KB Output is correct
43 Correct 220 ms 41396 KB Output is correct
44 Correct 1 ms 344 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 344 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 344 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 1 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 0 ms 348 KB Output is correct
54 Correct 1 ms 348 KB Output is correct
55 Correct 0 ms 348 KB Output is correct
56 Correct 1 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 1 ms 344 KB Output is correct
59 Correct 0 ms 436 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 1 ms 348 KB Output is correct
63 Correct 1 ms 344 KB Output is correct
64 Correct 156 ms 37384 KB Output is correct
65 Correct 143 ms 37320 KB Output is correct
66 Correct 208 ms 34848 KB Output is correct
67 Correct 206 ms 34640 KB Output is correct
68 Correct 20 ms 4032 KB Output is correct
69 Correct 21 ms 3676 KB Output is correct
70 Correct 18 ms 4016 KB Output is correct
71 Correct 16 ms 3932 KB Output is correct
72 Correct 12 ms 3928 KB Output is correct
73 Correct 20 ms 3676 KB Output is correct
74 Correct 83 ms 36592 KB Output is correct
75 Correct 82 ms 36600 KB Output is correct
76 Correct 218 ms 41284 KB Output is correct
77 Correct 204 ms 41268 KB Output is correct
78 Correct 212 ms 40572 KB Output is correct
79 Correct 216 ms 40420 KB Output is correct
80 Correct 73 ms 34400 KB Output is correct
81 Correct 307 ms 41232 KB Output is correct
82 Correct 312 ms 40816 KB Output is correct
83 Correct 221 ms 37196 KB Output is correct
84 Correct 229 ms 36976 KB Output is correct
85 Correct 212 ms 35720 KB Output is correct
86 Correct 216 ms 34928 KB Output is correct
87 Correct 166 ms 36252 KB Output is correct
88 Correct 223 ms 37960 KB Output is correct
89 Correct 244 ms 37808 KB Output is correct
90 Correct 210 ms 34652 KB Output is correct
91 Correct 213 ms 34656 KB Output is correct
92 Correct 212 ms 34404 KB Output is correct