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Submission #740436

# Submission time Handle Problem Language Result Execution time Memory
740436 2023-05-12T13:14:54 Z lohacho Comparing Plants (IOI20_plants) C++14
100 / 100
 1189 ms 81516 KB 
#include "plants.h"
#include <bits/stdc++.h>
using namespace std;

const int NS = (int)2e5 + 4;
int mn[NS * 4 + 4], id[NS * 4 + 4], lazy[NS * 4 + 4];
int k;
vector<int> r;
int ans[NS];
int n;
int L[NS][20], R[NS][20], LD[NS][20], RD[NS][20], bk[NS];

void update(int x, int s, int e){
	if(!lazy[x] || s == e) return;
	lazy[x * 2] += lazy[x], mn[x * 2] += lazy[x];
	lazy[x * 2 + 1] += lazy[x], mn[x * 2 + 1] += lazy[x];
	lazy[x] = 0;
}

void push(int x, int s, int e, int ps, int pe, int val){
	if(pe < s || ps > e || ps > pe){
		return;
	}
	if(ps <= s && pe >= e){
		if(s == e) id[x] = s;
		mn[x] += val;
		lazy[x] += val;
		return;
	}
	update(x, s, e);
	int m = s + e >> 1;
	push(x * 2, s, m, ps, pe, val);
	push(x * 2 + 1, m + 1, e, ps, pe, val);
	if(mn[x * 2] <= mn[x * 2 + 1]){
		mn[x] = mn[x * 2], id[x] = id[x * 2];
	}
	else{
		mn[x] = mn[x * 2 + 1], id[x] = id[x * 2 + 1];
	}
}

pair<int, int> get(int x, int s, int e, int fs, int fe){
	if(fe < s || fs > e || fs > fe){
		return {(int)1e9, (int)1e9};
	}
	if(fs <= s && fe >= e){
		return {mn[x], id[x]};
	}
	update(x, s, e);
	int m = s + e >> 1;
	return min(get(x * 2, s, m, fs, fe), get(x * 2 + 1, m + 1, e, fs, fe));
}

void init(int K, std::vector<int> RR) {
	k = K;
	r = RR;
	n = (int)r.size();
	for(int i = 0; i < n; ++i){
		push(1, 0, n - 1, i, i, r[i]);
	}
	for(int i = n - 1; i >= 0;){
		auto rv = get(1, 0, n - 1, 0, n - 1);
		auto sol = [&](auto&&self, int now)->void{
			while(true){
				rv = get(1, 0, n - 1, now - k + 1, now - 1);
				rv = min(rv, get(1, 0, n - 1, n - (k - now - 1), n - 1));
				if(rv.first == 0){
					self(self, rv.second);
				}
				else{
					break;
				}
			}
			ans[now] = i--;
			bk[ans[now]] = now;
			push(1, 0, n - 1, now - k + 1, now, -1);
			push(1, 0, n - 1, n - (k - now) + 1, n - 1, -1);
			push(1, 0, n - 1, now, now, (int)1e9);
		};
		sol(sol, rv.second);
	}

	memset(mn, 0, sizeof(mn));
	memset(lazy, 0, sizeof(lazy));
	for(int i = 0; i < n; ++i){
		int now = bk[i];
		auto rv = min(get(1, 0, n - 1, now - k + 1, now - 1), get(1, 0, n - 1, n - (k - now - 1), n - 1));
		L[now][0] = (rv.first ? rv.second : -1);
		if(L[now][0] != -1) LD[now][0] = (now - L[now][0] + n) % n;

		rv = min(get(1, 0, n - 1, now + 1, now + k - 1), get(1, 0, n - 1, 0, k - (n - now) - 1));
		R[now][0] = (rv.first ? rv.second : -1);
		if(R[now][0] != -1) RD[now][0] = (R[now][0] - now + n) % n;

		push(1, 0, n - 1, now, now, -i - 1);
	}

	for(int j = 1; j < 20; ++j){
		for(int i = 0; i < n; ++i){
			R[i][j] = (R[i][j - 1] == -1 ? -1 : R[R[i][j - 1]][j - 1]);
			if(R[i][j] != -1) RD[i][j] = min((int)1e9, RD[i][j - 1] + RD[R[i][j - 1]][j - 1]);
			L[i][j] = (L[i][j - 1] == -1 ? -1 : L[L[i][j - 1]][j - 1]);
			if(L[i][j] != -1) LD[i][j] = min((int)1e9, LD[i][j - 1] + LD[L[i][j - 1]][j - 1]);
		}
	}
}

int compare_plants(int x, int y) {
	for(int i = 0; i < 2; ++i){
		int now = x;
		for(int j = 19; j >= 0; --j){
			if(R[now][j] != -1 && RD[now][j] < (y - now + n) % n - (k - 1)){
				now = R[now][j];
			}
		}
		if(R[now][0] != -1 && (y - now + n) % n >= k) now = R[now][0];
		if((y - now + n) % n < k && ans[now] > ans[y]){
			return (i ? -1 : 1);
		}

		now = x;
		for(int j = 19; j >= 0; --j){
			if(L[now][j] != -1 && LD[now][j] < (now - y + n) % n - (k - 1)){
				now = L[now][j];
			}
		}
		if(L[now][0] != -1 && (now - y + n) % n >= k) now = L[now][0];
		if((now - y + n) % n < k && ans[now] > ans[y]){
			return (i ? -1 : 1);
		}

		swap(x, y);
	}

	return 0;
}

Compilation message

plants.cpp: In function 'void push(int, int, int, int, int, int)':
plants.cpp:31:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   31 |  int m = s + e >> 1;
      |          ~~^~~
plants.cpp: In function 'std::pair<int, int> get(int, int, int, int, int)':
plants.cpp:50:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   50 |  int m = s + e >> 1;
      |          ~~^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6612 KB Output is correct
2 Correct 4 ms 6612 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 3 ms 6612 KB Output is correct
5 Correct 5 ms 6612 KB Output is correct
6 Correct 120 ms 9328 KB Output is correct
7 Correct 192 ms 15284 KB Output is correct
8 Correct 537 ms 77488 KB Output is correct
9 Correct 571 ms 67792 KB Output is correct
10 Correct 600 ms 62620 KB Output is correct
11 Correct 631 ms 61976 KB Output is correct
12 Correct 623 ms 61900 KB Output is correct
13 Correct 615 ms 61812 KB Output is correct
14 Correct 704 ms 61788 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6612 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 3 ms 6612 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 7 ms 7012 KB Output is correct
7 Correct 101 ms 11072 KB Output is correct
8 Correct 5 ms 6612 KB Output is correct
9 Correct 7 ms 6996 KB Output is correct
10 Correct 103 ms 11136 KB Output is correct
11 Correct 76 ms 10884 KB Output is correct
12 Correct 151 ms 11036 KB Output is correct
13 Correct 101 ms 11136 KB Output is correct

Subtask #3
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6612 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 3 ms 6612 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 7 ms 7012 KB Output is correct
7 Correct 101 ms 11072 KB Output is correct
8 Correct 5 ms 6612 KB Output is correct
9 Correct 7 ms 6996 KB Output is correct
10 Correct 103 ms 11136 KB Output is correct
11 Correct 76 ms 10884 KB Output is correct
12 Correct 151 ms 11036 KB Output is correct
13 Correct 101 ms 11136 KB Output is correct
14 Correct 158 ms 16256 KB Output is correct
15 Correct 1189 ms 77556 KB Output is correct
16 Correct 162 ms 18476 KB Output is correct
17 Correct 1117 ms 81300 KB Output is correct
18 Correct 654 ms 72936 KB Output is correct
19 Correct 797 ms 73456 KB Output is correct
20 Correct 1061 ms 81288 KB Output is correct

Subtask #4
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6612 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 138 ms 10020 KB Output is correct
4 Correct 941 ms 78456 KB Output is correct
5 Correct 862 ms 77508 KB Output is correct
6 Correct 1091 ms 77528 KB Output is correct
7 Correct 1160 ms 77572 KB Output is correct
8 Correct 1186 ms 77452 KB Output is correct
9 Correct 686 ms 80636 KB Output is correct
10 Correct 814 ms 80656 KB Output is correct
11 Correct 629 ms 64720 KB Output is correct
12 Correct 817 ms 64876 KB Output is correct
13 Correct 670 ms 69736 KB Output is correct

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6612 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 3 ms 6612 KB Output is correct
5 Correct 3 ms 6612 KB Output is correct
6 Correct 6 ms 6612 KB Output is correct
7 Correct 31 ms 7244 KB Output is correct
8 Correct 23 ms 7244 KB Output is correct
9 Correct 29 ms 7248 KB Output is correct
10 Correct 23 ms 7240 KB Output is correct
11 Correct 32 ms 7244 KB Output is correct
12 Correct 31 ms 7244 KB Output is correct
13 Correct 24 ms 7252 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6612 KB Output is correct
2 Correct 3 ms 6612 KB Output is correct
3 Correct 2 ms 6612 KB Output is correct
4 Correct 3 ms 6520 KB Output is correct
5 Correct 6 ms 6908 KB Output is correct
6 Correct 687 ms 77564 KB Output is correct
7 Correct 860 ms 77564 KB Output is correct
8 Correct 928 ms 77516 KB Output is correct
9 Correct 1104 ms 77428 KB Output is correct
10 Correct 703 ms 79648 KB Output is correct
11 Correct 827 ms 80244 KB Output is correct
12 Correct 694 ms 80760 KB Output is correct
13 Correct 771 ms 79948 KB Output is correct
14 Correct 860 ms 80024 KB Output is correct
15 Correct 1085 ms 80240 KB Output is correct
16 Correct 664 ms 79568 KB Output is correct
17 Correct 721 ms 79708 KB Output is correct

Subtask #7
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 6612 KB Output is correct
2 Correct 4 ms 6612 KB Output is correct
3 Correct 3 ms 6612 KB Output is correct
4 Correct 3 ms 6612 KB Output is correct
5 Correct 5 ms 6612 KB Output is correct
6 Correct 120 ms 9328 KB Output is correct
7 Correct 192 ms 15284 KB Output is correct
8 Correct 537 ms 77488 KB Output is correct
9 Correct 571 ms 67792 KB Output is correct
10 Correct 600 ms 62620 KB Output is correct
11 Correct 631 ms 61976 KB Output is correct
12 Correct 623 ms 61900 KB Output is correct
13 Correct 615 ms 61812 KB Output is correct
14 Correct 704 ms 61788 KB Output is correct
15 Correct 3 ms 6612 KB Output is correct
16 Correct 3 ms 6612 KB Output is correct
17 Correct 3 ms 6612 KB Output is correct
18 Correct 3 ms 6612 KB Output is correct
19 Correct 3 ms 6612 KB Output is correct
20 Correct 7 ms 7012 KB Output is correct
21 Correct 101 ms 11072 KB Output is correct
22 Correct 5 ms 6612 KB Output is correct
23 Correct 7 ms 6996 KB Output is correct
24 Correct 103 ms 11136 KB Output is correct
25 Correct 76 ms 10884 KB Output is correct
26 Correct 151 ms 11036 KB Output is correct
27 Correct 101 ms 11136 KB Output is correct
28 Correct 158 ms 16256 KB Output is correct
29 Correct 1189 ms 77556 KB Output is correct
30 Correct 162 ms 18476 KB Output is correct
31 Correct 1117 ms 81300 KB Output is correct
32 Correct 654 ms 72936 KB Output is correct
33 Correct 797 ms 73456 KB Output is correct
34 Correct 1061 ms 81288 KB Output is correct
35 Correct 3 ms 6612 KB Output is correct
36 Correct 3 ms 6612 KB Output is correct
37 Correct 138 ms 10020 KB Output is correct
38 Correct 941 ms 78456 KB Output is correct
39 Correct 862 ms 77508 KB Output is correct
40 Correct 1091 ms 77528 KB Output is correct
41 Correct 1160 ms 77572 KB Output is correct
42 Correct 1186 ms 77452 KB Output is correct
43 Correct 686 ms 80636 KB Output is correct
44 Correct 814 ms 80656 KB Output is correct
45 Correct 629 ms 64720 KB Output is correct
46 Correct 817 ms 64876 KB Output is correct
47 Correct 670 ms 69736 KB Output is correct
48 Correct 3 ms 6612 KB Output is correct
49 Correct 3 ms 6612 KB Output is correct
50 Correct 3 ms 6612 KB Output is correct
51 Correct 3 ms 6612 KB Output is correct
52 Correct 3 ms 6612 KB Output is correct
53 Correct 6 ms 6612 KB Output is correct
54 Correct 31 ms 7244 KB Output is correct
55 Correct 23 ms 7244 KB Output is correct
56 Correct 29 ms 7248 KB Output is correct
57 Correct 23 ms 7240 KB Output is correct
58 Correct 32 ms 7244 KB Output is correct
59 Correct 31 ms 7244 KB Output is correct
60 Correct 24 ms 7252 KB Output is correct
61 Correct 132 ms 11772 KB Output is correct
62 Correct 179 ms 18340 KB Output is correct
63 Correct 644 ms 80352 KB Output is correct
64 Correct 776 ms 80576 KB Output is correct
65 Correct 1018 ms 80908 KB Output is correct
66 Correct 999 ms 81088 KB Output is correct
67 Correct 1076 ms 81176 KB Output is correct
68 Correct 720 ms 80648 KB Output is correct
69 Correct 945 ms 81252 KB Output is correct
70 Correct 802 ms 81516 KB Output is correct
71 Correct 943 ms 80732 KB Output is correct
72 Correct 1016 ms 80900 KB Output is correct
73 Correct 1066 ms 81128 KB Output is correct
74 Correct 636 ms 80484 KB Output is correct
75 Correct 730 ms 80588 KB Output is correct