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Submission #390661

# Submission time Handle Problem Language Result Execution time Memory
390661 2021-04-16T13:18:25 Z Keshi Ancient Books (IOI17_books) C++17
50 / 100
 859 ms 1048580 KB 
//In the name of God
#include <bits/stdc++.h>
#include "books.h"
using namespace std;

typedef int ll;
typedef pair<ll, ll> pll;

const ll maxn = 1e6 + 100;
const ll mod = 1e9 + 7;
const ll inf = 1e9;

#define pb push_back
#define Mp make_pair
#define F first
#define S second
#define Sz(x) ll((x).size())
#define all(x) (x).begin(), (x).end()
#define lc (id << 1)
#define rc (lc | 1)

ll a[maxn], t, tt, c[maxn], rr[maxn];
ll b[maxn];
ll mn[maxn], mx[maxn], mnp[maxn], mxp[maxn];
bool vis[maxn];
vector<ll> vec, g[maxn];
vector<pll> v2;

ll seg[maxn << 2];

void bld(ll id, ll s, ll e){
	if(e - s == 1){
		seg[id] = b[s];
		return;
	}
	ll mid = (s + e) >> 1;
	bld(lc, s, mid);
	bld(rc, mid, e);
	seg[id] = max(seg[lc], seg[rc]);
}
ll get(ll id, ll s, ll e, ll l, ll r){
	if(r <= s || e <= l) return 0;
	if(l <= s && e <= r) return seg[id];
	ll mid = (s + e) >> 1;
	return max(get(lc, s, mid, l, r), get(rc, mid, e, l, r));
}

ll sz[maxn], cnt[maxn];
bool val[maxn];

ll solve(ll v, ll s){
	ll x = -1;
	ll ans = 0;
	for(ll i = 0; i < Sz(g[v]); i++){
		ll u = g[v][i];
		if(mnp[u] <= s && s <= mxp[u]) x = i;
		if(mnp[v] == 0){
//			cout << "$ " << u << "    " << mnp[u] << " " << mxp[u] << "\n";
		}
		ans += solve(u, s);
		sz[v] += sz[u];
	}
	val[v] = (sz[v] == mxp[v] - mnp[v] + 1);
	if(x == -1 || mnp[v] > s || s > mxp[v]) return 0;
//	if(!val[g[v][x]]) cout << v << " [" << mnp[v] << ", " << mxp[v] << "]    ----->   " << ans << "\n";
	if(!val[g[v][x]]) return ans;
	ll j = 0;
	ll y = inf;
	ll o = mnp[g[v][x]];
	for(ll i = x; i--;){
		ll u = g[v][i];
		if(!val[u]) continue;
		j++;
		if(mxp[u] + 1 != o){
			y = min(y, j);
			break;
		}
		o = mnp[u];
	}
	y = min(y, j + 1);
	j = 0;
	o = mxp[g[v][x]];
	for(ll i = x + 1; i < Sz(g[v]); i++){
		ll u = g[v][i];
		if(!val[u]) continue;
		j++;
		if(mnp[u] != o + 1){
			y = min(y, j);
			break;
		}
		o = mxp[u];
	}
	y = min(y, j + 1);
//	cout << "# " << v << " [" << mnp[v] << ", " << mxp[v] << "]    ----->   ";
	if(mnp[v] == -1){
//		cout << ans + Sz(g[v]) - 1 << "\n";
		return ans + Sz(g[v]) - 1;
	}
//	cout << ans + y << "\n";
	return ans + y;
}

long long minimum_walk(vector<int> p, int s){
	ll n = Sz(p);
	ll l = 0;
	while(l < n && p[l] == l) l++;
	ll r = n;
	while(r && p[r - 1] == r - 1) r--;
	l = min(l, s);
	r = max(r, s + 1);
	mn[0] = -1;
	mx[0] = n;
	t++;
	long long ans = 0;
	for(ll i = l; i < r; i++){
		ans += abs(p[i] - i);
		if(!vis[i]){
			ll v = i;
			mn[t] = inf;
			mx[t] = -inf;
			do{
				vis[v] = 1;
				mx[t] = max(mx[t], v);
				mn[t] = min(mn[t], v);
				cnt[t]++;
				v = p[v];
			}while(v != i);
			rr[mx[t]] = t;
			b[mn[t]] = mx[t];
			t++;
		}
	}
	bld(1, 0, n);
	for(ll i = 0; i < t; i++){
		v2.pb(Mp(mn[i], i));
	}
	for(pll i : v2){
		if(!vis[i.S]) continue;
		mnp[tt] = i.F;
		mxp[tt] = mx[i.S];
		sz[tt] = cnt[i.S];
		vis[i.S] = 0;
		while(true){
			ll x = get(1, 0, n, mnp[tt], mxp[tt] + 1);
			if(!vis[rr[x]] || x <= mxp[tt]) break;
			mxp[tt] = x;
			sz[tt] += cnt[rr[x]];
			vis[rr[x]] = 0;
		}
		tt++;
	}
	vec.clear();
	v2.clear();
	ll root = -1;
	for(ll i = 0; i < tt; i++){
		if(mnp[i] == -1) root = i;
		v2.pb(Mp(mnp[i], i));
	}
	sort(all(v2));
	for(pll i : v2){
		if(vec.empty()){
			vec.pb(i.S);
			continue;
		}
		while(mxp[vec.back()] < i.F) vec.pop_back();
		g[vec.back()].pb(i.S);
		vec.pb(i.S);
	}
	ll xx = solve(root, s);
	ans += 2 * xx;

	return ans;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23756 KB Output is correct
2 Correct 16 ms 23756 KB Output is correct
3 Correct 17 ms 23756 KB Output is correct
4 Correct 16 ms 23756 KB Output is correct
5 Correct 16 ms 23884 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23860 KB Output is correct
8 Correct 15 ms 23764 KB Output is correct
9 Correct 15 ms 23756 KB Output is correct
10 Correct 16 ms 23756 KB Output is correct
11 Correct 16 ms 23756 KB Output is correct
12 Correct 16 ms 23756 KB Output is correct
13 Correct 15 ms 23840 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 15 ms 23884 KB Output is correct
16 Correct 16 ms 23880 KB Output is correct
17 Correct 17 ms 23808 KB Output is correct
18 Correct 15 ms 23756 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23756 KB Output is correct
2 Correct 16 ms 23756 KB Output is correct
3 Correct 17 ms 23756 KB Output is correct
4 Correct 16 ms 23756 KB Output is correct
5 Correct 16 ms 23884 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23860 KB Output is correct
8 Correct 15 ms 23764 KB Output is correct
9 Correct 15 ms 23756 KB Output is correct
10 Correct 16 ms 23756 KB Output is correct
11 Correct 16 ms 23756 KB Output is correct
12 Correct 16 ms 23756 KB Output is correct
13 Correct 15 ms 23840 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 15 ms 23884 KB Output is correct
16 Correct 16 ms 23880 KB Output is correct
17 Correct 17 ms 23808 KB Output is correct
18 Correct 15 ms 23756 KB Output is correct
19 Correct 16 ms 23816 KB Output is correct
20 Correct 15 ms 23884 KB Output is correct
21 Correct 17 ms 23852 KB Output is correct
22 Correct 16 ms 23888 KB Output is correct
23 Correct 16 ms 23884 KB Output is correct
24 Correct 16 ms 23828 KB Output is correct
25 Correct 16 ms 23884 KB Output is correct
26 Correct 16 ms 23884 KB Output is correct
27 Correct 15 ms 23884 KB Output is correct
28 Correct 16 ms 23820 KB Output is correct
29 Correct 16 ms 23884 KB Output is correct

Subtask #3
28.0 / 28.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23756 KB Output is correct
2 Correct 16 ms 23756 KB Output is correct
3 Correct 17 ms 23756 KB Output is correct
4 Correct 16 ms 23756 KB Output is correct
5 Correct 16 ms 23884 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23860 KB Output is correct
8 Correct 15 ms 23764 KB Output is correct
9 Correct 15 ms 23756 KB Output is correct
10 Correct 16 ms 23756 KB Output is correct
11 Correct 16 ms 23756 KB Output is correct
12 Correct 16 ms 23756 KB Output is correct
13 Correct 15 ms 23840 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 15 ms 23884 KB Output is correct
16 Correct 16 ms 23880 KB Output is correct
17 Correct 17 ms 23808 KB Output is correct
18 Correct 15 ms 23756 KB Output is correct
19 Correct 16 ms 23816 KB Output is correct
20 Correct 15 ms 23884 KB Output is correct
21 Correct 17 ms 23852 KB Output is correct
22 Correct 16 ms 23888 KB Output is correct
23 Correct 16 ms 23884 KB Output is correct
24 Correct 16 ms 23828 KB Output is correct
25 Correct 16 ms 23884 KB Output is correct
26 Correct 16 ms 23884 KB Output is correct
27 Correct 15 ms 23884 KB Output is correct
28 Correct 16 ms 23820 KB Output is correct
29 Correct 16 ms 23884 KB Output is correct
30 Correct 197 ms 40892 KB Output is correct
31 Correct 207 ms 40892 KB Output is correct
32 Correct 198 ms 39880 KB Output is correct
33 Correct 405 ms 77556 KB Output is correct
34 Correct 399 ms 77448 KB Output is correct
35 Correct 380 ms 70168 KB Output is correct
36 Correct 256 ms 59824 KB Output is correct
37 Correct 181 ms 50224 KB Output is correct
38 Correct 200 ms 47936 KB Output is correct
39 Correct 167 ms 47236 KB Output is correct
40 Correct 167 ms 42936 KB Output is correct
41 Correct 192 ms 41116 KB Output is correct
42 Correct 171 ms 41412 KB Output is correct
43 Correct 451 ms 81688 KB Output is correct

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23936 KB Output is correct
2 Correct 16 ms 23884 KB Output is correct
3 Correct 16 ms 23812 KB Output is correct
4 Correct 16 ms 23928 KB Output is correct
5 Correct 16 ms 23904 KB Output is correct
6 Correct 16 ms 23884 KB Output is correct
7 Correct 17 ms 23928 KB Output is correct
8 Correct 16 ms 23884 KB Output is correct
9 Correct 16 ms 23884 KB Output is correct
10 Runtime error 859 ms 1048580 KB Execution killed with signal 9
11 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 23756 KB Output is correct
2 Correct 16 ms 23756 KB Output is correct
3 Correct 17 ms 23756 KB Output is correct
4 Correct 16 ms 23756 KB Output is correct
5 Correct 16 ms 23884 KB Output is correct
6 Correct 16 ms 23916 KB Output is correct
7 Correct 16 ms 23860 KB Output is correct
8 Correct 15 ms 23764 KB Output is correct
9 Correct 15 ms 23756 KB Output is correct
10 Correct 16 ms 23756 KB Output is correct
11 Correct 16 ms 23756 KB Output is correct
12 Correct 16 ms 23756 KB Output is correct
13 Correct 15 ms 23840 KB Output is correct
14 Correct 16 ms 23764 KB Output is correct
15 Correct 15 ms 23884 KB Output is correct
16 Correct 16 ms 23880 KB Output is correct
17 Correct 17 ms 23808 KB Output is correct
18 Correct 15 ms 23756 KB Output is correct
19 Correct 16 ms 23816 KB Output is correct
20 Correct 15 ms 23884 KB Output is correct
21 Correct 17 ms 23852 KB Output is correct
22 Correct 16 ms 23888 KB Output is correct
23 Correct 16 ms 23884 KB Output is correct
24 Correct 16 ms 23828 KB Output is correct
25 Correct 16 ms 23884 KB Output is correct
26 Correct 16 ms 23884 KB Output is correct
27 Correct 15 ms 23884 KB Output is correct
28 Correct 16 ms 23820 KB Output is correct
29 Correct 16 ms 23884 KB Output is correct
30 Correct 197 ms 40892 KB Output is correct
31 Correct 207 ms 40892 KB Output is correct
32 Correct 198 ms 39880 KB Output is correct
33 Correct 405 ms 77556 KB Output is correct
34 Correct 399 ms 77448 KB Output is correct
35 Correct 380 ms 70168 KB Output is correct
36 Correct 256 ms 59824 KB Output is correct
37 Correct 181 ms 50224 KB Output is correct
38 Correct 200 ms 47936 KB Output is correct
39 Correct 167 ms 47236 KB Output is correct
40 Correct 167 ms 42936 KB Output is correct
41 Correct 192 ms 41116 KB Output is correct
42 Correct 171 ms 41412 KB Output is correct
43 Correct 451 ms 81688 KB Output is correct
44 Correct 16 ms 23936 KB Output is correct
45 Correct 16 ms 23884 KB Output is correct
46 Correct 16 ms 23812 KB Output is correct
47 Correct 16 ms 23928 KB Output is correct
48 Correct 16 ms 23904 KB Output is correct
49 Correct 16 ms 23884 KB Output is correct
50 Correct 17 ms 23928 KB Output is correct
51 Correct 16 ms 23884 KB Output is correct
52 Correct 16 ms 23884 KB Output is correct
53 Runtime error 859 ms 1048580 KB Execution killed with signal 9
54 Halted 0 ms 0 KB -