oj.uz

답안 #528890

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
528890 2022-02-21T17:00:33 Z AriaH 3단 점프 (JOI19_jumps) C++17
100 / 100
 1265 ms 133952 KB 
/* I can do this all day */

#pragma GCC optimize("Ofast")

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef pair < int, int > pii;
typedef pair < ll, ll > pll;

#define F first
#define S second
#define all(x) x.begin(),x.end()
#define Mp make_pair
#define point complex
#define endl '\n'
#define SZ(x) (int)x.size()
#define fast_io ios::sync_with_stdio(0), cin.tie(0), cout.tie(0)
#define file_io freopen("input.txt", "r+", stdin); freopen("output.txt", "w+", stdout);
#define mashtali return cout << "Hello, World!", 0;

const int N = 1e6 + 10;
const int LOG = 20;
const ll mod = 1e9 + 7;
const ll inf = 1e18;
const double pi = acos(-1);
const ld eps = 1e-18;
const ld one = 1.;

ll pw(ll a, ll b, ll M, ll ret = 1) { if(a == 0) return 0; a %= M; while(b) { ret = (b & 1? ret * a % M : ret), a = a * a % M, b >>= 1; } return ret % M; }

mt19937 rng(time(nullptr));

int n, q, A[N];

vector < int > vec[N];

vector < pii > Q[N];

ll Ans[N], Mn[N << 2], Mx[N << 2], seg[N << 2], lz[N << 2];

void build(int v = 1, int tl = 1, int tr = n)
{
	if(tl == tr)
	{
		seg[v] = A[tl];
		return;
	}
	int mid = (tl + tr) >> 1;
	build(v << 1, tl, mid), build(v << 1 | 1, mid + 1, tr);
	seg[v] = max(seg[v << 1], seg[v << 1 | 1]);
}

void Push(int v, ll x)
{
	Mn[v] += x;
	Mx[v] += x;
	lz[v] += x;
	seg[v] += x;
}

void S(int v, int tl, int tr)
{
	if(tl == tr) return;
	Push(v << 1, lz[v]);
	Push(v << 1 | 1, lz[v]);
	lz[v] = 0;
}

void upd(int l, int r, ll x, int v = 1, int tl = 1, int tr = n)
{
	S(v, tl, tr);
	if(l > tr || r < tl || l > r || Mn[v] >= x) return;
	if(l <= tl && tr <= r && Mn[v] == Mx[v])
	{
		Push(v, x - Mn[v]);
		return;
	}
	int mid = (tl + tr) >> 1;
	upd(l, r, x, v << 1, tl, mid), upd(l, r, x, v << 1 | 1, mid + 1, tr);
	seg[v] = max({seg[v << 1], seg[v << 1 | 1]});
	Mn[v] = min(Mn[v << 1], Mn[v << 1 | 1]);
	Mx[v] = max(Mx[v << 1], Mx[v << 1 | 1]);
}

ll get(int l, int r, int v = 1, int tl = 1, int tr = n)
{
	S(v, tl, tr);
	if(l > tr || r < tl || l > r) return -inf;
	if(l <= tl && tr <= r) return seg[v];
	int mid = (tl + tr) >> 1;
	return max(get(l, r, v << 1, tl, mid), get(l, r, v << 1 | 1, mid + 1, tr));
}

int main()
{
	fast_io;
	vector < int > S;
	cin >> n;
	for(int i = 1; i <= n; i ++)
	{
		cin >> A[i];
		while(SZ(S) && A[S.back()] < A[i])
		{
			vec[S.back()].push_back(i);
			S.pop_back();
		}
		if(SZ(S))
		{
			vec[S.back()].push_back(i);
		}
		S.push_back(i);
	}
	cin >> q;
	for(int i = 1; i <= q; i ++)
	{
		int fir, sec;
		cin >> fir >> sec;
		Q[fir].push_back({sec, i});
	}
	build();
	for(int i = n; ~(i - 1); i --)
	{
		for(auto id : vec[i])
		{
			///printf("i = %d id = %d\n", i, id);
			upd(id * 2 - i, n, A[i] + A[id]);
		}
		for(auto cu : Q[i])
		{
			int id = cu.S, r = cu.F;
			Ans[id] = get(i + 2, r);
		}
		/*printf("i = %d\n", i);
		for(int j = 1; j <= n; j ++)
		{
			for(int k = j; k <= n; k ++)
			{
				printf("j = %d k = %d get = %lld\n", j, k, get(j, k));
			}
		}
		printf("\n");
		*/
	}
	for(int i = 1; i <= q; i ++)
	{
		cout << Ans[i] << endl;
	}
	return 0;
}

/* check corner case(n = 1?), watch for negetive index or overflow */

Subtask #1
5.0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 47300 KB Output is correct
2 Correct 23 ms 47264 KB Output is correct
3 Correct 24 ms 47224 KB Output is correct
4 Correct 24 ms 47308 KB Output is correct
5 Correct 24 ms 47272 KB Output is correct
6 Correct 24 ms 47300 KB Output is correct
7 Correct 24 ms 47344 KB Output is correct
8 Correct 24 ms 47336 KB Output is correct
9 Correct 25 ms 47272 KB Output is correct
10 Correct 24 ms 47248 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 47300 KB Output is correct
2 Correct 23 ms 47264 KB Output is correct
3 Correct 24 ms 47224 KB Output is correct
4 Correct 24 ms 47308 KB Output is correct
5 Correct 24 ms 47272 KB Output is correct
6 Correct 24 ms 47300 KB Output is correct
7 Correct 24 ms 47344 KB Output is correct
8 Correct 24 ms 47336 KB Output is correct
9 Correct 25 ms 47272 KB Output is correct
10 Correct 24 ms 47248 KB Output is correct
11 Correct 289 ms 68648 KB Output is correct
12 Correct 349 ms 68540 KB Output is correct
13 Correct 299 ms 68572 KB Output is correct
14 Correct 305 ms 68684 KB Output is correct
15 Correct 301 ms 68628 KB Output is correct
16 Correct 286 ms 67896 KB Output is correct
17 Correct 286 ms 67868 KB Output is correct
18 Correct 287 ms 67860 KB Output is correct
19 Correct 282 ms 68416 KB Output is correct

Subtask #3
27.0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Correct 233 ms 72696 KB Output is correct
2 Correct 123 ms 72452 KB Output is correct
3 Correct 127 ms 73248 KB Output is correct
4 Correct 226 ms 72692 KB Output is correct
5 Correct 214 ms 72776 KB Output is correct
6 Correct 214 ms 72012 KB Output is correct
7 Correct 216 ms 72068 KB Output is correct
8 Correct 207 ms 71924 KB Output is correct
9 Correct 215 ms 72200 KB Output is correct

Subtask #4
54.0 / 54.0

# 결과 실행 시간 메모리 Grader output
1 Correct 23 ms 47300 KB Output is correct
2 Correct 23 ms 47264 KB Output is correct
3 Correct 24 ms 47224 KB Output is correct
4 Correct 24 ms 47308 KB Output is correct
5 Correct 24 ms 47272 KB Output is correct
6 Correct 24 ms 47300 KB Output is correct
7 Correct 24 ms 47344 KB Output is correct
8 Correct 24 ms 47336 KB Output is correct
9 Correct 25 ms 47272 KB Output is correct
10 Correct 24 ms 47248 KB Output is correct
11 Correct 289 ms 68648 KB Output is correct
12 Correct 349 ms 68540 KB Output is correct
13 Correct 299 ms 68572 KB Output is correct
14 Correct 305 ms 68684 KB Output is correct
15 Correct 301 ms 68628 KB Output is correct
16 Correct 286 ms 67896 KB Output is correct
17 Correct 286 ms 67868 KB Output is correct
18 Correct 287 ms 67860 KB Output is correct
19 Correct 282 ms 68416 KB Output is correct
20 Correct 233 ms 72696 KB Output is correct
21 Correct 123 ms 72452 KB Output is correct
22 Correct 127 ms 73248 KB Output is correct
23 Correct 226 ms 72692 KB Output is correct
24 Correct 214 ms 72776 KB Output is correct
25 Correct 214 ms 72012 KB Output is correct
26 Correct 216 ms 72068 KB Output is correct
27 Correct 207 ms 71924 KB Output is correct
28 Correct 215 ms 72200 KB Output is correct
29 Correct 1265 ms 128048 KB Output is correct
30 Correct 949 ms 127644 KB Output is correct
31 Correct 958 ms 129472 KB Output is correct
32 Correct 1184 ms 128164 KB Output is correct
33 Correct 1194 ms 128148 KB Output is correct
34 Correct 1146 ms 125832 KB Output is correct
35 Correct 1167 ms 125820 KB Output is correct
36 Correct 1199 ms 125760 KB Output is correct
37 Correct 1165 ms 127020 KB Output is correct
38 Correct 884 ms 133732 KB Output is correct
39 Correct 853 ms 133952 KB Output is correct
40 Correct 830 ms 130512 KB Output is correct
41 Correct 821 ms 129920 KB Output is correct
42 Correct 830 ms 129996 KB Output is correct
43 Correct 866 ms 131680 KB Output is correct
44 Correct 905 ms 133152 KB Output is correct
45 Correct 982 ms 133148 KB Output is correct
46 Correct 902 ms 129988 KB Output is correct
47 Correct 887 ms 129640 KB Output is correct
48 Correct 892 ms 129628 KB Output is correct
49 Correct 898 ms 131656 KB Output is correct
50 Correct 1028 ms 131280 KB Output is correct
51 Correct 969 ms 131272 KB Output is correct
52 Correct 1054 ms 128844 KB Output is correct
53 Correct 1065 ms 128496 KB Output is correct
54 Correct 1004 ms 128516 KB Output is correct
55 Correct 974 ms 130096 KB Output is correct