oj.uz

Submission #183335

# Submission time Handle Problem Language Result Execution time Memory
183335 2020-01-10T06:09:59 Z oolimry Land of the Rainbow Gold (APIO17_rainbow) C++14
100 / 100
 1162 ms 96204 KB 
#include "rainbow.h"
#include <bits/stdc++.h>
using namespace std;

///Land cells are vertices, and two adjacent land cells form an edge
///All faces formed are 2x2 squares, where all 4 cells are land cells
///Except possibly when the entire rectangle surrounds the rivers, then there is 1 more additonal face on the inside
///As the graph is planar, No. of components = V - E + F (We ignore the outer face as a face)
///As the V, E and F are large, we instead use a segment tree to count how many vertices, edges and faces are absent. 

const int N = 200002;
int totalRivers;
struct segment{
	vector<int> tree[2*N+5];
	
	inline void update(int i, int v){
		tree[i+N].push_back(v);
	}
	
	inline void getReady(){
		for(int i = N;i < 2*N;i++){
			sort(tree[i].begin(),tree[i].end());
			tree[i].erase(unique(tree[i].begin(),tree[i].end()),tree[i].end());
		}
		for(int i = N-1;i > 0;i--){ ///basically merge sort
			tree[i] = vector<int>(tree[i<<1].size()+tree[i<<1|1].size());
			merge(tree[i<<1].begin(),tree[i<<1].end(), tree[i<<1|1].begin(),tree[i<<1|1].end(),tree[i].begin());
		}
	}
	
	inline int query(int l, int r, int x, int y){ 
		int ans = 0;
		for(l += N, r += (N+1);l < r;l >>= 1, r >>= 1){
			if(l&1){
				ans += upper_bound(tree[l].begin(),tree[l].end(),y) - lower_bound(tree[l].begin(),tree[l].end(),x);
				l++;
			}
			if(r&1){
				r--;
				ans += upper_bound(tree[r].begin(),tree[r].end(),y) - lower_bound(tree[r].begin(),tree[r].end(),x);
			}
		}
		return ans;
	}

} vertices, horizontal, vertical, faces;
///Vertices store vertices which are rivers
///Edges store edges which are not between two land cells, horizontal is (r,c) to (r,c+1), vertical is (r,c) to (r+1,c)
///Squares store which group of 4 sqaures with at least 1 river. It stores the top left corner (r,c)

void addRiver(int r, int c){
	vertices.update(r,c);
	horizontal.update(r,c-1);
	horizontal.update(r,c);
	vertical.update(c,r-1);
	vertical.update(c,r);
	faces.update(r-1,c-1);
	faces.update(r,c-1);
	faces.update(r-1,c);
	faces.update(r,c);
}

void init(int R, int C, int sr, int sc, int M, char *S) {
	addRiver(sr,sc);
	for(int i = 0;i < M;i++){
		if(S[i] == 'N') sr--;
		else if(S[i] == 'S') sr++;
		else if(S[i] == 'E') sc++;
		else sc--;
		addRiver(sr,sc);
	}
	vertices.getReady(); horizontal.getReady(); vertical.getReady(); faces.getReady();
	totalRivers = vertices.query(0,N-1,0,N-1);
}

int colour(int T, int L, int B, int R) {
	long long H = B - T + 1, W = R - L + 1;
	
	long long V = H * W - vertices.query(T,B,L,R);
	long long E = (H-1)*W + (W-1)*H - horizontal.query(T,B,L,R-1) - vertical.query(L,R,T,B-1);
	long long F = (H-1)*(W-1) - faces.query(T,B-1,L,R-1);
	if(vertices.query(T+1,B-1,L+1,R-1) == totalRivers) F++;
	
	return V - E + F;
}

Subtask #1
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 38008 KB Output is correct
2 Correct 44 ms 38264 KB Output is correct
3 Correct 45 ms 38136 KB Output is correct
4 Correct 47 ms 38008 KB Output is correct
5 Correct 49 ms 38396 KB Output is correct
6 Correct 44 ms 37880 KB Output is correct
7 Correct 44 ms 37948 KB Output is correct
8 Correct 44 ms 37880 KB Output is correct
9 Correct 43 ms 37928 KB Output is correct
10 Correct 48 ms 37936 KB Output is correct
11 Correct 48 ms 38136 KB Output is correct
12 Correct 47 ms 38264 KB Output is correct
13 Correct 48 ms 38520 KB Output is correct
14 Correct 50 ms 38648 KB Output is correct
15 Correct 43 ms 37984 KB Output is correct
16 Correct 43 ms 37880 KB Output is correct
17 Correct 42 ms 37880 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 37880 KB Output is correct
2 Correct 42 ms 37880 KB Output is correct
3 Correct 318 ms 67108 KB Output is correct
4 Correct 458 ms 86328 KB Output is correct
5 Correct 476 ms 85472 KB Output is correct
6 Correct 318 ms 74456 KB Output is correct
7 Correct 378 ms 73944 KB Output is correct
8 Correct 170 ms 43104 KB Output is correct
9 Correct 511 ms 86556 KB Output is correct
10 Correct 538 ms 85736 KB Output is correct
11 Correct 411 ms 74456 KB Output is correct
12 Correct 240 ms 83168 KB Output is correct
13 Correct 242 ms 86364 KB Output is correct
14 Correct 248 ms 85536 KB Output is correct
15 Correct 228 ms 74492 KB Output is correct
16 Correct 320 ms 72160 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 43 ms 37984 KB Output is correct
2 Correct 128 ms 87644 KB Output is correct
3 Correct 191 ms 95340 KB Output is correct
4 Correct 165 ms 87744 KB Output is correct
5 Correct 136 ms 78808 KB Output is correct
6 Correct 95 ms 50932 KB Output is correct
7 Correct 105 ms 58652 KB Output is correct
8 Correct 137 ms 79128 KB Output is correct
9 Correct 124 ms 74732 KB Output is correct
10 Correct 86 ms 48412 KB Output is correct
11 Correct 123 ms 63448 KB Output is correct
12 Correct 130 ms 87824 KB Output is correct
13 Correct 171 ms 95428 KB Output is correct
14 Correct 145 ms 87840 KB Output is correct
15 Correct 135 ms 78816 KB Output is correct
16 Correct 92 ms 49216 KB Output is correct
17 Correct 103 ms 58076 KB Output is correct
18 Correct 122 ms 82808 KB Output is correct
19 Correct 141 ms 89304 KB Output is correct
20 Correct 142 ms 89312 KB Output is correct
21 Correct 127 ms 78944 KB Output is correct
22 Correct 126 ms 74728 KB Output is correct
23 Correct 82 ms 48508 KB Output is correct
24 Correct 116 ms 63320 KB Output is correct
25 Correct 127 ms 87628 KB Output is correct
26 Correct 163 ms 95392 KB Output is correct
27 Correct 143 ms 87772 KB Output is correct
28 Correct 138 ms 78880 KB Output is correct
29 Correct 90 ms 49204 KB Output is correct
30 Correct 102 ms 58044 KB Output is correct
31 Correct 122 ms 82936 KB Output is correct
32 Correct 142 ms 89316 KB Output is correct
33 Correct 143 ms 89312 KB Output is correct

Subtask #4
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 38008 KB Output is correct
2 Correct 44 ms 38264 KB Output is correct
3 Correct 45 ms 38136 KB Output is correct
4 Correct 47 ms 38008 KB Output is correct
5 Correct 49 ms 38396 KB Output is correct
6 Correct 44 ms 37880 KB Output is correct
7 Correct 44 ms 37948 KB Output is correct
8 Correct 44 ms 37880 KB Output is correct
9 Correct 43 ms 37928 KB Output is correct
10 Correct 48 ms 37936 KB Output is correct
11 Correct 48 ms 38136 KB Output is correct
12 Correct 47 ms 38264 KB Output is correct
13 Correct 48 ms 38520 KB Output is correct
14 Correct 50 ms 38648 KB Output is correct
15 Correct 43 ms 37984 KB Output is correct
16 Correct 43 ms 37880 KB Output is correct
17 Correct 42 ms 37880 KB Output is correct
18 Correct 1162 ms 63732 KB Output is correct
19 Correct 274 ms 39692 KB Output is correct
20 Correct 225 ms 38776 KB Output is correct
21 Correct 242 ms 39032 KB Output is correct
22 Correct 261 ms 39284 KB Output is correct
23 Correct 251 ms 39664 KB Output is correct
24 Correct 306 ms 39236 KB Output is correct
25 Correct 293 ms 39208 KB Output is correct
26 Correct 292 ms 39416 KB Output is correct
27 Correct 501 ms 60024 KB Output is correct
28 Correct 479 ms 51516 KB Output is correct
29 Correct 488 ms 58664 KB Output is correct
30 Correct 841 ms 83588 KB Output is correct
31 Correct 47 ms 37904 KB Output is correct
32 Correct 973 ms 59928 KB Output is correct

Subtask #5
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 38008 KB Output is correct
2 Correct 44 ms 38264 KB Output is correct
3 Correct 45 ms 38136 KB Output is correct
4 Correct 47 ms 38008 KB Output is correct
5 Correct 49 ms 38396 KB Output is correct
6 Correct 44 ms 37880 KB Output is correct
7 Correct 44 ms 37948 KB Output is correct
8 Correct 44 ms 37880 KB Output is correct
9 Correct 43 ms 37928 KB Output is correct
10 Correct 48 ms 37936 KB Output is correct
11 Correct 48 ms 38136 KB Output is correct
12 Correct 47 ms 38264 KB Output is correct
13 Correct 48 ms 38520 KB Output is correct
14 Correct 50 ms 38648 KB Output is correct
15 Correct 43 ms 37984 KB Output is correct
16 Correct 43 ms 37880 KB Output is correct
17 Correct 42 ms 37880 KB Output is correct
18 Correct 1162 ms 63732 KB Output is correct
19 Correct 274 ms 39692 KB Output is correct
20 Correct 225 ms 38776 KB Output is correct
21 Correct 242 ms 39032 KB Output is correct
22 Correct 261 ms 39284 KB Output is correct
23 Correct 251 ms 39664 KB Output is correct
24 Correct 306 ms 39236 KB Output is correct
25 Correct 293 ms 39208 KB Output is correct
26 Correct 292 ms 39416 KB Output is correct
27 Correct 501 ms 60024 KB Output is correct
28 Correct 479 ms 51516 KB Output is correct
29 Correct 488 ms 58664 KB Output is correct
30 Correct 841 ms 83588 KB Output is correct
31 Correct 47 ms 37904 KB Output is correct
32 Correct 973 ms 59928 KB Output is correct
33 Correct 128 ms 87644 KB Output is correct
34 Correct 191 ms 95340 KB Output is correct
35 Correct 165 ms 87744 KB Output is correct
36 Correct 136 ms 78808 KB Output is correct
37 Correct 95 ms 50932 KB Output is correct
38 Correct 105 ms 58652 KB Output is correct
39 Correct 137 ms 79128 KB Output is correct
40 Correct 124 ms 74732 KB Output is correct
41 Correct 86 ms 48412 KB Output is correct
42 Correct 123 ms 63448 KB Output is correct
43 Correct 130 ms 87824 KB Output is correct
44 Correct 171 ms 95428 KB Output is correct
45 Correct 145 ms 87840 KB Output is correct
46 Correct 135 ms 78816 KB Output is correct
47 Correct 92 ms 49216 KB Output is correct
48 Correct 103 ms 58076 KB Output is correct
49 Correct 122 ms 82808 KB Output is correct
50 Correct 141 ms 89304 KB Output is correct
51 Correct 142 ms 89312 KB Output is correct
52 Correct 127 ms 78944 KB Output is correct
53 Correct 126 ms 74728 KB Output is correct
54 Correct 82 ms 48508 KB Output is correct
55 Correct 116 ms 63320 KB Output is correct
56 Correct 127 ms 87628 KB Output is correct
57 Correct 163 ms 95392 KB Output is correct
58 Correct 143 ms 87772 KB Output is correct
59 Correct 138 ms 78880 KB Output is correct
60 Correct 90 ms 49204 KB Output is correct
61 Correct 102 ms 58044 KB Output is correct
62 Correct 122 ms 82936 KB Output is correct
63 Correct 142 ms 89316 KB Output is correct
64 Correct 143 ms 89312 KB Output is correct
65 Correct 706 ms 79644 KB Output is correct
66 Correct 725 ms 75500 KB Output is correct
67 Correct 491 ms 49260 KB Output is correct
68 Correct 643 ms 64016 KB Output is correct
69 Correct 584 ms 88424 KB Output is correct
70 Correct 894 ms 96204 KB Output is correct
71 Correct 596 ms 88560 KB Output is correct
72 Correct 567 ms 79576 KB Output is correct
73 Correct 338 ms 49836 KB Output is correct
74 Correct 343 ms 58784 KB Output is correct
75 Correct 375 ms 83688 KB Output is correct
76 Correct 740 ms 90088 KB Output is correct
77 Correct 820 ms 90072 KB Output is correct
78 Correct 318 ms 67108 KB Output is correct
79 Correct 458 ms 86328 KB Output is correct
80 Correct 476 ms 85472 KB Output is correct
81 Correct 318 ms 74456 KB Output is correct
82 Correct 378 ms 73944 KB Output is correct
83 Correct 170 ms 43104 KB Output is correct
84 Correct 511 ms 86556 KB Output is correct
85 Correct 538 ms 85736 KB Output is correct
86 Correct 411 ms 74456 KB Output is correct
87 Correct 240 ms 83168 KB Output is correct
88 Correct 242 ms 86364 KB Output is correct
89 Correct 248 ms 85536 KB Output is correct
90 Correct 228 ms 74492 KB Output is correct
91 Correct 320 ms 72160 KB Output is correct