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Submission #684647

# Submission time Handle Problem Language Result Execution time Memory
684647 2023-01-22T09:04:27 Z pragmatist Money (IZhO17_money) C++17
45 / 100
 403 ms 250532 KB 
/*
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")
*/

#include<bits/stdc++.h>
 
#define sz(v) (int)v.size()
#define ll long long
#define pb push_back
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define rall(v) v.rbegin(), v.rend()
#define nl "\n"

using namespace std;

const int N = (int)1e6 + 7; // make sure this is right
const int M = (int)1e7 + 7;
const int inf = (int)2e9 + 7;
const ll INF = (ll)3e18 + 7; 
const ll MOD = (ll)1e9 + 7; // make sure this is right

bool bit(int x, int i) {
	return x >> i & 1;
}

int sum(int x, int y) {
	x += y;
	if(x >= MOD) x -= MOD;
	return x;
}

int n, a[N], dp[N], p[N];
int timer, tree[N], t[M], L[M], R[M], lim = 1e6;

void build(int v, int tl, int tr) {
	if(tl == tr) {
		return;
	}
	int mid = (tl + tr) >> 1;
	L[v] = ++timer;
	build(L[v], tl, mid);
	R[v] = ++timer;
	build(R[v], mid + 1, tr);
}

void upd(int prev, int v, int tl, int tr, int id) {
	if(tl == tr) {
		t[v] = t[prev] + 1;
		return;
	}
	int mid = (tl + tr) >> 1;
	if(id <= mid) {
		L[v] = ++timer;
		R[v] = R[prev];
		upd(L[prev], L[v], tl, mid, id); 
	} else {
		R[v] = ++timer;
		L[v] = L[prev];
		upd(R[prev], R[v], mid + 1, tr, id);
	}
	t[v] = t[L[v]] + t[R[v]];
} 

int get(int v, int tl, int tr, int id) {
	if(tl == tr) {
		return tl;
	}	
	int mid = (tl + tr) >> 1;
	if(t[L[v]] >= id) return get(L[v], tl, mid, id);
	else return get(R[v], mid + 1, tr, id - t[L[v]]);
}

int get(int i, int j) {	
	return get(tree[i], 1, lim, j);
}

void solve() {
	cin >> n;
	tree[0] = ++timer;
	build(1, 1, lim);
	for(int i = 1; i <= n; ++i) {
		cin >> a[i];
		tree[i] = ++timer;
		upd(tree[i - 1], tree[i], 1, lim, a[i]);
		if(i > 1) p[i] = p[i - 1] + (a[i - 1] <= a[i]);
	}
	int j = 1;
	for(int i = 1; i <= n; ++i) {
	    dp[i] = inf;
	    while(j <= i) {
	    	if(p[i] - p[j] != i - j) {
	    	    j++;
	    		continue;
	    	}
        	bool can = (a[j] >= get(j - 1, j - 1) || a[i] <= get(j - 1, 1));
        	
        	int l = 1, r = j - 2, k = -1;
        	while(l <= r) {
        		int mid = (l + r) >> 1;
        		if(a[i] <= get(j - 1, mid + 1)) {
        			k = mid;
        			r = mid - 1;
        		} else {
        			l = mid + 1;
        		}
        	}
        	if(k != -1) {
        		can |= (a[j] >= get(j - 1, k));
        	}
        	if(can) {
        		dp[i] = min(dp[i], dp[j - 1] + 1);
        		break;
        	} else {
        		j++;
        	}
		}				
	}
	cout << dp[n];
}

signed main() {	
	ios_base::sync_with_stdio(0);
	cin.tie(NULL);
	int test = 1;
	//cin >> test;
	for(int i = 1; i <= test; ++i) {
	 	//cout << "Case #" << i << ": ";
		solve();
	}
	return 0;
}

Subtask #1
9.0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 16080 KB Output is correct
2 Correct 11 ms 15956 KB Output is correct
3 Correct 12 ms 15956 KB Output is correct
4 Correct 12 ms 16032 KB Output is correct
5 Correct 12 ms 15956 KB Output is correct
6 Correct 11 ms 15956 KB Output is correct
7 Correct 11 ms 16040 KB Output is correct
8 Correct 11 ms 15956 KB Output is correct
9 Correct 11 ms 15948 KB Output is correct
10 Correct 11 ms 15956 KB Output is correct
11 Correct 12 ms 15956 KB Output is correct
12 Correct 11 ms 15952 KB Output is correct
13 Correct 11 ms 15956 KB Output is correct
14 Correct 11 ms 15956 KB Output is correct
15 Correct 12 ms 16012 KB Output is correct
16 Correct 11 ms 15928 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 16080 KB Output is correct
2 Correct 11 ms 15956 KB Output is correct
3 Correct 12 ms 15956 KB Output is correct
4 Correct 12 ms 16032 KB Output is correct
5 Correct 12 ms 15956 KB Output is correct
6 Correct 11 ms 15956 KB Output is correct
7 Correct 11 ms 16040 KB Output is correct
8 Correct 11 ms 15956 KB Output is correct
9 Correct 11 ms 15948 KB Output is correct
10 Correct 11 ms 15956 KB Output is correct
11 Correct 12 ms 15956 KB Output is correct
12 Correct 11 ms 15952 KB Output is correct
13 Correct 11 ms 15956 KB Output is correct
14 Correct 11 ms 15956 KB Output is correct
15 Correct 12 ms 16012 KB Output is correct
16 Correct 11 ms 15928 KB Output is correct
17 Correct 11 ms 16020 KB Output is correct
18 Correct 11 ms 15932 KB Output is correct
19 Correct 12 ms 15980 KB Output is correct
20 Correct 11 ms 15956 KB Output is correct
21 Correct 11 ms 15956 KB Output is correct
22 Correct 11 ms 15972 KB Output is correct
23 Correct 11 ms 15964 KB Output is correct
24 Correct 14 ms 15956 KB Output is correct
25 Correct 12 ms 15956 KB Output is correct
26 Correct 12 ms 16028 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 16080 KB Output is correct
2 Correct 11 ms 15956 KB Output is correct
3 Correct 12 ms 15956 KB Output is correct
4 Correct 12 ms 16032 KB Output is correct
5 Correct 12 ms 15956 KB Output is correct
6 Correct 11 ms 15956 KB Output is correct
7 Correct 11 ms 16040 KB Output is correct
8 Correct 11 ms 15956 KB Output is correct
9 Correct 11 ms 15948 KB Output is correct
10 Correct 11 ms 15956 KB Output is correct
11 Correct 12 ms 15956 KB Output is correct
12 Correct 11 ms 15952 KB Output is correct
13 Correct 11 ms 15956 KB Output is correct
14 Correct 11 ms 15956 KB Output is correct
15 Correct 12 ms 16012 KB Output is correct
16 Correct 11 ms 15928 KB Output is correct
17 Correct 11 ms 16020 KB Output is correct
18 Correct 11 ms 15932 KB Output is correct
19 Correct 12 ms 15980 KB Output is correct
20 Correct 11 ms 15956 KB Output is correct
21 Correct 11 ms 15956 KB Output is correct
22 Correct 11 ms 15972 KB Output is correct
23 Correct 11 ms 15964 KB Output is correct
24 Correct 14 ms 15956 KB Output is correct
25 Correct 12 ms 15956 KB Output is correct
26 Correct 12 ms 16028 KB Output is correct
27 Correct 12 ms 16084 KB Output is correct
28 Correct 11 ms 16028 KB Output is correct
29 Correct 11 ms 15988 KB Output is correct
30 Correct 11 ms 15956 KB Output is correct
31 Correct 11 ms 15956 KB Output is correct
32 Correct 12 ms 16084 KB Output is correct
33 Correct 11 ms 16128 KB Output is correct
34 Correct 12 ms 16084 KB Output is correct
35 Correct 11 ms 16212 KB Output is correct
36 Correct 11 ms 16084 KB Output is correct
37 Correct 12 ms 16064 KB Output is correct
38 Correct 12 ms 16084 KB Output is correct

Subtask #4
0 / 55.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 16080 KB Output is correct
2 Correct 11 ms 15956 KB Output is correct
3 Correct 12 ms 15956 KB Output is correct
4 Correct 12 ms 16032 KB Output is correct
5 Correct 12 ms 15956 KB Output is correct
6 Correct 11 ms 15956 KB Output is correct
7 Correct 11 ms 16040 KB Output is correct
8 Correct 11 ms 15956 KB Output is correct
9 Correct 11 ms 15948 KB Output is correct
10 Correct 11 ms 15956 KB Output is correct
11 Correct 12 ms 15956 KB Output is correct
12 Correct 11 ms 15952 KB Output is correct
13 Correct 11 ms 15956 KB Output is correct
14 Correct 11 ms 15956 KB Output is correct
15 Correct 12 ms 16012 KB Output is correct
16 Correct 11 ms 15928 KB Output is correct
17 Correct 11 ms 16020 KB Output is correct
18 Correct 11 ms 15932 KB Output is correct
19 Correct 12 ms 15980 KB Output is correct
20 Correct 11 ms 15956 KB Output is correct
21 Correct 11 ms 15956 KB Output is correct
22 Correct 11 ms 15972 KB Output is correct
23 Correct 11 ms 15964 KB Output is correct
24 Correct 14 ms 15956 KB Output is correct
25 Correct 12 ms 15956 KB Output is correct
26 Correct 12 ms 16028 KB Output is correct
27 Correct 12 ms 16084 KB Output is correct
28 Correct 11 ms 16028 KB Output is correct
29 Correct 11 ms 15988 KB Output is correct
30 Correct 11 ms 15956 KB Output is correct
31 Correct 11 ms 15956 KB Output is correct
32 Correct 12 ms 16084 KB Output is correct
33 Correct 11 ms 16128 KB Output is correct
34 Correct 12 ms 16084 KB Output is correct
35 Correct 11 ms 16212 KB Output is correct
36 Correct 11 ms 16084 KB Output is correct
37 Correct 12 ms 16064 KB Output is correct
38 Correct 12 ms 16084 KB Output is correct
39 Runtime error 403 ms 250532 KB Execution killed with signal 11
40 Halted 0 ms 0 KB -