oj.uz

답안 #847683

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
847683 2023-09-10T06:53:09 Z qwerasdfzxcl Mizuyokan 2 (JOI23_mizuyokan2) C++17
60 / 100
 4000 ms 225876 KB 
#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

constexpr int INF1 = 1e9 + 100;

int n;
int a[250250];

int go[250250], sp[250250][20];
ll S[250250];

struct Node{
	array<int, 2> f[51];
	int pos, sz;

	Node(){}
	Node(int _pos, int nxt){
		f[0] = {nxt, 1};
		pos = _pos;
		sz = 1;
	}
};

array<int, 2> operator + (const array<int, 2> &x, int y){
	return {x[0], x[1]+y};
}

void merge(Node &P, const Node &L, const Node &R){
	P.sz = 0;
	for (int i=0;i<L.sz;i++){
		if (L.f[i][0] >= R.pos + R.sz) P.f[P.sz++] = L.f[i];
		else P.f[P.sz++] = R.f[L.f[i][0]-R.pos] + L.f[i][1];
	}

	for (int i=0;i<R.sz;i++){
		if (P.sz==51) return;
		P.f[P.sz++] = R.f[i];
	}
}

void push(Node &L, const Node &R){
	for (int i=0;i<L.sz;i++) if (L.f[i][0] < R.pos + R.sz) L.f[i] = R.f[L.f[i][0]-R.pos] + L.f[i][1];
	for (int i=0;i<R.sz;i++){
		if (L.sz==51) return;
		L.f[L.sz++] = R.f[i];
	}
}

struct Seg{
	Node tree[1101000], ret;

	void init(int i, int l, int r){
		if (l==r) {tree[i] = Node(l, go[l]); return;}
		
		int m = (l+r)>>1;
		init(i<<1, l, m); init(i<<1|1, m+1, r);

		tree[i].pos = l;
		merge(tree[i], tree[i<<1], tree[i<<1|1]);
	}

	void update(int i, int l, int r, int s, int e){
		if (r<s || e<l) return;
		if (l==r){
			tree[i] = Node(l, go[l]);
			return;
		}

		int m = (l+r)>>1;
		update(i<<1, l, m, s, e); update(i<<1|1, m+1, r, s, e);
		merge(tree[i], tree[i<<1], tree[i<<1|1]);
	}

	void query(int i, int l, int r, int s, int e){
		if (r<s || e<l) return;
		if (s<=l && r<=e){
			push(ret, tree[i]);
			return;
		}

		int m = (l+r)>>1;
		query(i<<1, l, m, s, e); query(i<<1|1, m+1, r, s, e);
	}
}tree;

struct Seg2{
	ll tree[500500];
	int sz;

	void init(int n){
		sz = n;
		for (int i=sz;i<sz*2;i++) tree[i] = a[i-sz];
		for (int i=sz-1;i;i--) tree[i] = tree[i<<1] + tree[i<<1|1];
	}

	void update(int p, int x){
		p += sz;
		tree[p] = x;
		for (p>>=1;p;p>>=1) tree[p] = tree[p<<1] + tree[p<<1|1];
	}

	ll query(int l, int r){
		r++;
		ll ret = 0;
		for (l+=sz, r+=sz;l<r;l>>=1, r>>=1){
			if (l&1) ret += tree[l++];
			if (r&1) ret += tree[--r];
		}

		return ret;
	}
}tree2;

void init(int n){
	for (int i=1;i<=n;i++) S[i] = S[i-1] + a[i];

	go[n+1] = n+1;
	for (int i=1;i<=n;i++){
		go[i] = n+1;
		for (int j=i+2;j<=min(i+50, n);j++) if (S[j-1] - S[i] > max(a[i], a[j])){
			go[i] = j;
			break;
		}
	}

	for (int i=n;i;i--) go[i] = min(go[i], go[i+1]);
	for (int i=1;i<=n;i++) assert(go[i] - i <= 50);

	tree.init(1, 1, n);
	tree2.init(n+1);
}

int solve(int l, int r){
	if (r-l+1 < 3) return -INF1;
	
	int cnt = 0;
	tree.ret.sz = 0;
	tree.ret.pos = l;
	tree.query(1, 1, n, l, r);

	for (int i=0;i<tree.ret.sz;i++) cnt = max(cnt, tree.ret.f[i][1]-1);

	return cnt * 2 + 1;
}

int query(int l, int r){
	int ret = 1;
	if (l==r) return ret;
	if (tree2.query(l, r-1) > a[r]) ret = 2;
	if (tree2.query(l+1, r) > a[l]) ret = 2;

	int nl = r+1, nr = l-1;
	ll sum = a[l];
	for (int i=l+1;i<=min(l+30, r);sum += a[i++]) if (sum > a[i]) {nl = i; break;}
	sum = a[r];
	for (int i=r-1;i>=max(l, r-30);sum += a[i--]) if (sum > a[i]) {nr = i; break;}
	if (nl <= nr) ret = 3;

	return max({ret, solve(l, r), solve(nl, r) + 1, solve(l, nr) + 1, solve(nl, nr) + 2});
}

void update(int x, int y){
	a[x] = y;
	tree2.update(x, y);

	for (int i=x;i>=max(1, x-50);i--){
		go[i] = go[i+1];
		ll sum = a[i+1];
		for (int j=i+2;j<=min(i+50, go[i+1]-1);sum += a[j++]) if (sum > max(a[i], a[j])){
			go[i] = j;
			break;
		}
	}

	tree.update(1, 1, n, max(1, x-50), x);
	init(n);
}

int main(){
	scanf("%d", &n);
	for (int i=1;i<=n;i++) scanf("%d", a+i);

	init(n);

	int q;
	scanf("%d", &q);
	while(q--){
		int x, y, l, r;
		scanf("%d %d %d %d", &x, &y, &l, &r);
		
		if (a[x]!=y) update(x, y);

		l++;
		printf("%d\n", query(l, r));
	}
}

Compilation message

mizuyokan2.cpp: In function 'int main()':
mizuyokan2.cpp:182:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  182 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
mizuyokan2.cpp:183:30: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  183 |  for (int i=1;i<=n;i++) scanf("%d", a+i);
      |                         ~~~~~^~~~~~~~~~~
mizuyokan2.cpp:188:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  188 |  scanf("%d", &q);
      |  ~~~~~^~~~~~~~~~
mizuyokan2.cpp:191:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  191 |   scanf("%d %d %d %d", &x, &y, &l, &r);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
6.0 / 6.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4560 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4440 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct

Subtask #2
9.0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4560 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4440 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6624 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 2 ms 6488 KB Output is correct
31 Correct 2 ms 6492 KB Output is correct
32 Correct 2 ms 6492 KB Output is correct
33 Correct 3 ms 6492 KB Output is correct
34 Correct 2 ms 6492 KB Output is correct
35 Correct 2 ms 6492 KB Output is correct
36 Correct 2 ms 6492 KB Output is correct
37 Correct 2 ms 6492 KB Output is correct
38 Correct 2 ms 6492 KB Output is correct
39 Correct 1 ms 6492 KB Output is correct
40 Correct 2 ms 6672 KB Output is correct

Subtask #3
13.0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4560 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4440 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6624 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 2 ms 6488 KB Output is correct
31 Correct 2 ms 6492 KB Output is correct
32 Correct 2 ms 6492 KB Output is correct
33 Correct 3 ms 6492 KB Output is correct
34 Correct 2 ms 6492 KB Output is correct
35 Correct 2 ms 6492 KB Output is correct
36 Correct 2 ms 6492 KB Output is correct
37 Correct 2 ms 6492 KB Output is correct
38 Correct 2 ms 6492 KB Output is correct
39 Correct 1 ms 6492 KB Output is correct
40 Correct 2 ms 6672 KB Output is correct
41 Correct 222 ms 224928 KB Output is correct
42 Correct 262 ms 225116 KB Output is correct
43 Correct 251 ms 225188 KB Output is correct
44 Correct 155 ms 222288 KB Output is correct
45 Correct 271 ms 224992 KB Output is correct
46 Correct 300 ms 225364 KB Output is correct
47 Correct 213 ms 222492 KB Output is correct
48 Correct 280 ms 225024 KB Output is correct
49 Correct 294 ms 225328 KB Output is correct
50 Correct 298 ms 225424 KB Output is correct
51 Correct 297 ms 225224 KB Output is correct
52 Correct 172 ms 222548 KB Output is correct
53 Correct 280 ms 225192 KB Output is correct
54 Correct 285 ms 225192 KB Output is correct
55 Correct 247 ms 225108 KB Output is correct
56 Correct 267 ms 225120 KB Output is correct
57 Correct 251 ms 225104 KB Output is correct
58 Correct 261 ms 225108 KB Output is correct
59 Correct 159 ms 225304 KB Output is correct
60 Correct 151 ms 225192 KB Output is correct

Subtask #4
32.0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 180 ms 222512 KB Output is correct
3 Correct 245 ms 225384 KB Output is correct
4 Correct 284 ms 225208 KB Output is correct
5 Correct 235 ms 225368 KB Output is correct
6 Correct 391 ms 225444 KB Output is correct
7 Correct 391 ms 225404 KB Output is correct
8 Correct 373 ms 225380 KB Output is correct
9 Correct 384 ms 225224 KB Output is correct
10 Correct 343 ms 222804 KB Output is correct
11 Correct 399 ms 225340 KB Output is correct
12 Correct 441 ms 225352 KB Output is correct
13 Correct 401 ms 225812 KB Output is correct
14 Correct 395 ms 225464 KB Output is correct
15 Correct 406 ms 225876 KB Output is correct
16 Correct 395 ms 225364 KB Output is correct
17 Correct 146 ms 225208 KB Output is correct
18 Correct 393 ms 225488 KB Output is correct

Subtask #5
0 / 29.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Execution timed out 4077 ms 225068 KB Time limit exceeded
4 Halted 0 ms 0 KB -

Subtask #6
0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 4444 KB Output is correct
2 Correct 1 ms 4444 KB Output is correct
3 Correct 1 ms 4444 KB Output is correct
4 Correct 1 ms 4444 KB Output is correct
5 Correct 1 ms 4444 KB Output is correct
6 Correct 1 ms 4444 KB Output is correct
7 Correct 1 ms 4444 KB Output is correct
8 Correct 1 ms 4440 KB Output is correct
9 Correct 1 ms 4444 KB Output is correct
10 Correct 1 ms 4444 KB Output is correct
11 Correct 1 ms 4444 KB Output is correct
12 Correct 1 ms 4560 KB Output is correct
13 Correct 1 ms 4444 KB Output is correct
14 Correct 1 ms 4444 KB Output is correct
15 Correct 1 ms 4440 KB Output is correct
16 Correct 1 ms 4444 KB Output is correct
17 Correct 1 ms 4444 KB Output is correct
18 Correct 1 ms 4444 KB Output is correct
19 Correct 1 ms 4444 KB Output is correct
20 Correct 1 ms 4444 KB Output is correct
21 Correct 1 ms 4444 KB Output is correct
22 Correct 2 ms 6492 KB Output is correct
23 Correct 2 ms 6624 KB Output is correct
24 Correct 2 ms 6492 KB Output is correct
25 Correct 2 ms 6492 KB Output is correct
26 Correct 2 ms 6492 KB Output is correct
27 Correct 3 ms 6744 KB Output is correct
28 Correct 2 ms 6492 KB Output is correct
29 Correct 2 ms 6492 KB Output is correct
30 Correct 2 ms 6488 KB Output is correct
31 Correct 2 ms 6492 KB Output is correct
32 Correct 2 ms 6492 KB Output is correct
33 Correct 3 ms 6492 KB Output is correct
34 Correct 2 ms 6492 KB Output is correct
35 Correct 2 ms 6492 KB Output is correct
36 Correct 2 ms 6492 KB Output is correct
37 Correct 2 ms 6492 KB Output is correct
38 Correct 2 ms 6492 KB Output is correct
39 Correct 1 ms 6492 KB Output is correct
40 Correct 2 ms 6672 KB Output is correct
41 Correct 222 ms 224928 KB Output is correct
42 Correct 262 ms 225116 KB Output is correct
43 Correct 251 ms 225188 KB Output is correct
44 Correct 155 ms 222288 KB Output is correct
45 Correct 271 ms 224992 KB Output is correct
46 Correct 300 ms 225364 KB Output is correct
47 Correct 213 ms 222492 KB Output is correct
48 Correct 280 ms 225024 KB Output is correct
49 Correct 294 ms 225328 KB Output is correct
50 Correct 298 ms 225424 KB Output is correct
51 Correct 297 ms 225224 KB Output is correct
52 Correct 172 ms 222548 KB Output is correct
53 Correct 280 ms 225192 KB Output is correct
54 Correct 285 ms 225192 KB Output is correct
55 Correct 247 ms 225108 KB Output is correct
56 Correct 267 ms 225120 KB Output is correct
57 Correct 251 ms 225104 KB Output is correct
58 Correct 261 ms 225108 KB Output is correct
59 Correct 159 ms 225304 KB Output is correct
60 Correct 151 ms 225192 KB Output is correct
61 Correct 1 ms 4444 KB Output is correct
62 Correct 180 ms 222512 KB Output is correct
63 Correct 245 ms 225384 KB Output is correct
64 Correct 284 ms 225208 KB Output is correct
65 Correct 235 ms 225368 KB Output is correct
66 Correct 391 ms 225444 KB Output is correct
67 Correct 391 ms 225404 KB Output is correct
68 Correct 373 ms 225380 KB Output is correct
69 Correct 384 ms 225224 KB Output is correct
70 Correct 343 ms 222804 KB Output is correct
71 Correct 399 ms 225340 KB Output is correct
72 Correct 441 ms 225352 KB Output is correct
73 Correct 401 ms 225812 KB Output is correct
74 Correct 395 ms 225464 KB Output is correct
75 Correct 406 ms 225876 KB Output is correct
76 Correct 395 ms 225364 KB Output is correct
77 Correct 146 ms 225208 KB Output is correct
78 Correct 393 ms 225488 KB Output is correct
79 Correct 1 ms 4444 KB Output is correct
80 Correct 1 ms 4444 KB Output is correct
81 Execution timed out 4077 ms 225068 KB Time limit exceeded
82 Halted 0 ms 0 KB -