oj.uz

Submission #1030516

# Submission time Handle Problem Language Result Execution time Memory
1030516 2024-07-22T06:16:28 Z vjudge1 Ancient Books (IOI17_books) C++17
50 / 100
 123 ms 37420 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){
		tree[pos+size]=val;
	}
	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-ri)){
				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-lf);
				pq.push({dist[vis[nxt]],vis[nxt]});
			}
		}
	}
	rep(i,cnt){
		if(wide[i].first==sl)ans+=dist[i]*2;
	}
	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:79:3: note: in expansion of macro 'rng'
   79 |   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:87:3: note: in expansion of macro 'rep'
   87 |   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:74:9: note: 'sr' was declared here
   74 |  int sl,sr;
      |         ^~
books.cpp:74:6: warning: 'sl' may be used uninitialized in this function [-Wmaybe-uninitialized]
   74 |  int sl,sr;
      |      ^~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 856 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 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 348 KB Output is correct
17 Correct 0 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 344 KB Output is correct
2 Correct 0 ms 856 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 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 348 KB Output is correct
17 Correct 0 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 0 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 0 ms 348 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 432 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 856 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 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 348 KB Output is correct
17 Correct 0 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 0 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 0 ms 348 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 432 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 102 ms 34384 KB Output is correct
31 Correct 100 ms 34420 KB Output is correct
32 Correct 73 ms 34372 KB Output is correct
33 Correct 90 ms 36844 KB Output is correct
34 Correct 90 ms 36588 KB Output is correct
35 Correct 96 ms 37032 KB Output is correct
36 Correct 85 ms 36312 KB Output is correct
37 Correct 85 ms 34824 KB Output is correct
38 Correct 85 ms 34644 KB Output is correct
39 Correct 80 ms 34412 KB Output is correct
40 Correct 80 ms 34388 KB Output is correct
41 Correct 123 ms 34528 KB Output is correct
42 Correct 99 ms 34388 KB Output is correct
43 Correct 89 ms 37420 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2147486390'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 856 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 600 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 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 348 KB Output is correct
17 Correct 0 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 0 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 0 ms 348 KB Output is correct
25 Correct 1 ms 600 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 432 KB Output is correct
28 Correct 0 ms 348 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 102 ms 34384 KB Output is correct
31 Correct 100 ms 34420 KB Output is correct
32 Correct 73 ms 34372 KB Output is correct
33 Correct 90 ms 36844 KB Output is correct
34 Correct 90 ms 36588 KB Output is correct
35 Correct 96 ms 37032 KB Output is correct
36 Correct 85 ms 36312 KB Output is correct
37 Correct 85 ms 34824 KB Output is correct
38 Correct 85 ms 34644 KB Output is correct
39 Correct 80 ms 34412 KB Output is correct
40 Correct 80 ms 34388 KB Output is correct
41 Correct 123 ms 34528 KB Output is correct
42 Correct 99 ms 34388 KB Output is correct
43 Correct 89 ms 37420 KB Output is correct
44 Incorrect 0 ms 348 KB 3rd lines differ - on the 1st token, expected: '3304', found: '2147486390'
45 Halted 0 ms 0 KB -