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Submission #935139

# Submission time Handle Problem Language Result Execution time Memory
935139 2024-02-28T17:44:36 Z Lobo Ancient Books (IOI17_books) C++17
12 / 100
 14 ms 58196 KB 
#include "books.h"
#include<bits/stdc++.h>
using namespace std;
const long long inf = (long long) 1e18 + 10;
const int inf1 = (int) 1e9 + 10;
#define int long long
#define dbl long double
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()
const int maxn = 1e6+10;

int n;
int ds[maxn], dsz[maxn], dsl[maxn], dsr[maxn];
int nxr[maxn], costr[maxn];

int find(int v) {
	if(v == ds[v]) return v;
	return ds[v] = find(ds[v]);
}

void join(int u, int v) {
	u = find(u);
	v = find(v);
	if(u == v) return;

	if(dsz[u] < dsz[v]) swap(u,v);
	dsz[u]+= dsz[v];
	dsl[u] = min(dsl[u],dsl[v]);
	dsr[u] = max(dsr[u],dsr[v]);
	ds[v] = u;
}

int L,R;
map<int,int> dp[maxn];
int sol(int l, int r) {
	if(dp[l].count(r)) return dp[l][r];
	if(l == L && r == R) return dp[l][r] = 0;

	dp[l][r] = inf;
	if(l > L) dp[l][r] = min(dp[l][r],2+sol(dsl[find(l-1)],max(r,dsr[find(l-1)])));
	if(r < R) dp[l][r] = min(dp[l][r],2*costr[r+1]+sol(min(l,dsl[find(nxr[r+1])]),dsr[find(nxr[r+1])]));
	return dp[l][r];
}

long long minimum_walk(vector<int32_t> p, int32_t s) {
	// return 0;

	n = p.size();

	for(int i = 0; i < n; i++) {
		ds[i] = i;
		dsz[i] = 1;
		dsl[i] = i;
		dsr[i] = i;
	}

	for(int i = 0; i < n; i++) {
		join(i,p[i]);
	}

	int itl = s;
	while(itl != n) {
		int itr = itl;
		int cur = itl;
		while(cur <= itr) {
			itr = max(itr,dsr[find(cur)]);
			cur++;
		}
		for(int i = itl; i < itr; i++) {
			join(i,i+1);
		}
		itl = itr+1;
	}

	int itr = s;
	while(itr >= 0) {
		int itl = itr;
		int cur = itr;
		while(cur >= itl) {
			itl = min(itl,dsl[find(cur)]);
			cur--;
		}
		for(int i = itl; i < itr; i++) {
			join(i,i+1);
		}
		itr = itl-1;
	}

	L = 0;
	R = n-1;
	while(L < s && dsz[find(L)] == 1) L++;
	while(R > s && dsz[find(R)] == 1) R--;

	for(int i = R-1; i >= s; i--) {
		if(dsl[find(i+1)] <= s or dsr[find(i+1)] == R) {
			nxr[i] = i+1;
			costr[i] = 1;
		}
		else {
			nxr[i] = nxr[i+1];
			costr[i] = costr[i+1]+1;
		}
	}


	int ans = 0;
	for(int i = 0; i < n; i++) ans+= abs(p[i]-i);

	return ans+sol(dsl[find(s)],dsr[find(s)]);
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 57948 KB Output is correct
2 Correct 12 ms 57992 KB Output is correct
3 Correct 13 ms 57948 KB Output is correct
4 Correct 14 ms 58068 KB Output is correct
5 Correct 13 ms 57948 KB Output is correct
6 Correct 12 ms 57948 KB Output is correct
7 Correct 13 ms 57948 KB Output is correct
8 Correct 13 ms 57944 KB Output is correct
9 Correct 12 ms 55900 KB Output is correct
10 Correct 13 ms 57948 KB Output is correct
11 Correct 12 ms 55904 KB Output is correct
12 Correct 13 ms 58048 KB Output is correct
13 Correct 12 ms 58068 KB Output is correct
14 Correct 12 ms 55900 KB Output is correct
15 Correct 12 ms 57948 KB Output is correct
16 Correct 13 ms 57948 KB Output is correct
17 Correct 12 ms 57948 KB Output is correct
18 Correct 13 ms 58056 KB Output is correct

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 57948 KB Output is correct
2 Correct 12 ms 57992 KB Output is correct
3 Correct 13 ms 57948 KB Output is correct
4 Correct 14 ms 58068 KB Output is correct
5 Correct 13 ms 57948 KB Output is correct
6 Correct 12 ms 57948 KB Output is correct
7 Correct 13 ms 57948 KB Output is correct
8 Correct 13 ms 57944 KB Output is correct
9 Correct 12 ms 55900 KB Output is correct
10 Correct 13 ms 57948 KB Output is correct
11 Correct 12 ms 55904 KB Output is correct
12 Correct 13 ms 58048 KB Output is correct
13 Correct 12 ms 58068 KB Output is correct
14 Correct 12 ms 55900 KB Output is correct
15 Correct 12 ms 57948 KB Output is correct
16 Correct 13 ms 57948 KB Output is correct
17 Correct 12 ms 57948 KB Output is correct
18 Correct 13 ms 58056 KB Output is correct
19 Correct 12 ms 58196 KB Output is correct
20 Correct 13 ms 58076 KB Output is correct
21 Correct 12 ms 55900 KB Output is correct
22 Incorrect 12 ms 57944 KB 3rd lines differ - on the 1st token, expected: '2082', found: '2778'
23 Halted 0 ms 0 KB -

Subtask #3
0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 57948 KB Output is correct
2 Correct 12 ms 57992 KB Output is correct
3 Correct 13 ms 57948 KB Output is correct
4 Correct 14 ms 58068 KB Output is correct
5 Correct 13 ms 57948 KB Output is correct
6 Correct 12 ms 57948 KB Output is correct
7 Correct 13 ms 57948 KB Output is correct
8 Correct 13 ms 57944 KB Output is correct
9 Correct 12 ms 55900 KB Output is correct
10 Correct 13 ms 57948 KB Output is correct
11 Correct 12 ms 55904 KB Output is correct
12 Correct 13 ms 58048 KB Output is correct
13 Correct 12 ms 58068 KB Output is correct
14 Correct 12 ms 55900 KB Output is correct
15 Correct 12 ms 57948 KB Output is correct
16 Correct 13 ms 57948 KB Output is correct
17 Correct 12 ms 57948 KB Output is correct
18 Correct 13 ms 58056 KB Output is correct
19 Correct 12 ms 58196 KB Output is correct
20 Correct 13 ms 58076 KB Output is correct
21 Correct 12 ms 55900 KB Output is correct
22 Incorrect 12 ms 57944 KB 3rd lines differ - on the 1st token, expected: '2082', found: '2778'
23 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 57948 KB Output is correct
2 Correct 13 ms 57944 KB Output is correct
3 Correct 12 ms 57948 KB Output is correct
4 Incorrect 13 ms 57948 KB 3rd lines differ - on the 1st token, expected: '2094', found: '2368'
5 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 57948 KB Output is correct
2 Correct 12 ms 57992 KB Output is correct
3 Correct 13 ms 57948 KB Output is correct
4 Correct 14 ms 58068 KB Output is correct
5 Correct 13 ms 57948 KB Output is correct
6 Correct 12 ms 57948 KB Output is correct
7 Correct 13 ms 57948 KB Output is correct
8 Correct 13 ms 57944 KB Output is correct
9 Correct 12 ms 55900 KB Output is correct
10 Correct 13 ms 57948 KB Output is correct
11 Correct 12 ms 55904 KB Output is correct
12 Correct 13 ms 58048 KB Output is correct
13 Correct 12 ms 58068 KB Output is correct
14 Correct 12 ms 55900 KB Output is correct
15 Correct 12 ms 57948 KB Output is correct
16 Correct 13 ms 57948 KB Output is correct
17 Correct 12 ms 57948 KB Output is correct
18 Correct 13 ms 58056 KB Output is correct
19 Correct 12 ms 58196 KB Output is correct
20 Correct 13 ms 58076 KB Output is correct
21 Correct 12 ms 55900 KB Output is correct
22 Incorrect 12 ms 57944 KB 3rd lines differ - on the 1st token, expected: '2082', found: '2778'
23 Halted 0 ms 0 KB -