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Submission #904192

# Submission time Handle Problem Language Result Execution time Memory
904192 2024-01-11T21:48:09 Z jamjanek Giraffes (JOI22_giraffes) C++14
100 / 100
 3734 ms 2668 KB 
#include<bits/stdc++.h>
using namespace std;

pair<int,int>tab[8010];
vector<pair<int,int>>points;
struct kwadrat{pair<int, int> A; pair<int,int>B;};

vector<kwadrat>warstwy[2];
int wynik, n;

pair<int,int>rotate(pair<int,int>A){
	int pomx = A.second;
	int pomy = n-A.first+1;
	return {pomx, pomy};
}
kwadrat rotateK(kwadrat A){
	A.A = rotate(A.A);
	A.B = rotate(A.B);
	swap(A.A.second, A.B.second);
	return A;
}

const int base = 1<<13;
const int inf = 1000000;
int tree[2*base];

void dodaj(int x, int w){
	x+=base;
	while(x>0){
		tree[x] = min(tree[x], w);
		x/=2;
	}
}
int query(int w, int l, int p, int a, int b){
	if(l>b || p<a)return inf;
	if(a<=l && p<=b)
		return tree[w];
	return min(query(w*2, l, (l+p)/2, a, b), query(w*2+1, (l+p)/2+1, p, a, b));
}

void policz(int w){
	vector<pair<int,int>>vec;
	vector<int>pom(n+1,inf);
	for(int i = 0;i<(int)warstwy[!w].size();i++)
		vec.push_back({warstwy[!w][i].A.first-warstwy[!w][i].A.second, (i+1)});
	for(int i=0;i<(int)points.size();i++)
		vec.push_back({points[i].first-points[i].second, -(i+1)});

	sort(vec.begin(), vec.end());
	for(auto &j:tree)j = inf;
	for(auto j: vec){
		if(j.second<0){
			int i = -j.second-1;
			int xd = query(1, 0, base-1, points[i].first+1, base-1);
			pom[i] = min(pom[i], xd-points[i].second);
//			printf("  %d %d %d\n", points[i].first, points[i].second, pom[i]);
		}
		else{
			int i = j.second-1;
			dodaj(warstwy[!w][i].A.first, warstwy[!w][i].B.second);
		}
	}
	reverse(vec.begin(), vec.end());
	for(auto &j:tree)j = inf;
	for(auto j: vec){
		if(j.second<0){
			int i = -j.second-1;
			int xd = query(1, 0, base-1, points[i].second+1, base-1);
			pom[i] = min(pom[i], xd-points[i].first);
//			printf("    %d %d %d\n", points[i].first, points[i].second, pom[i]);

		}
		else{
			int i = j.second-1;
			dodaj(warstwy[!w][i].A.second, warstwy[!w][i].B.first);
		}
	}
	for(int i=0;i<(int)points.size();i++)
		if(max(points[i].first, points[i].second)+pom[i]<=n)
			warstwy[w].push_back({{points[i].first, points[i].second}, {points[i].first+pom[i], points[i].second+pom[i]}});
//	for(int i=0;i<(int)points.size();i++)
//		printf("%d %d %d\n", points[i].first, points[i].second, pom[i]);
//	for(auto j: warstwy[w])
//		printf("%d %d %d %d\n", j.A.first, j.A.second, j.B.first, j.B.second);
//	printf("\n");
}

int main()
{
	int i, a;
	scanf("%d", &n);
	for(i=1;i<=n;i++){
		scanf("%d", &a);
		tab[i].first = i;
		tab[i].second = a;
		warstwy[0].push_back({{i, a}, {i,a}});
		points.push_back({i, a});
	}
	wynik = 0;	
	for(int w=1;warstwy[!w].size()>0;w^=1){
		wynik++;
//		printf("%d\n", wynik);
		warstwy[w].clear();
		for(i=0;i<4;i++){
			policz(w);
			for(auto &j: warstwy[!w])
				j = rotateK(j);
			for(auto &j: warstwy[w])
				j = rotateK(j);
			for(auto &j: points)
				j = rotate(j);
		}
//		for(auto j: warstwy[w])printf("%d %d %d %d\n", j.A.first, j.A.second, j.B.first, j.B.second);printf("\n");
//		exit(0);
	}
	
	printf("%d\n", n-wynik);
}

Compilation message

giraffes.cpp: In function 'int main()':
giraffes.cpp:91:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   91 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
giraffes.cpp:93:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   93 |   scanf("%d", &a);
      |   ~~~~~^~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct

Subtask #2
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct

Subtask #3
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 4 ms 348 KB Output is correct
23 Correct 11 ms 564 KB Output is correct
24 Correct 16 ms 348 KB Output is correct
25 Correct 21 ms 592 KB Output is correct
26 Correct 21 ms 344 KB Output is correct
27 Correct 22 ms 348 KB Output is correct
28 Correct 21 ms 588 KB Output is correct
29 Correct 23 ms 592 KB Output is correct
30 Correct 23 ms 344 KB Output is correct

Subtask #4
41.0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 344 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Correct 1 ms 348 KB Output is correct
13 Correct 1 ms 348 KB Output is correct
14 Correct 1 ms 348 KB Output is correct
15 Correct 1 ms 348 KB Output is correct
16 Correct 1 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 1 ms 348 KB Output is correct
19 Correct 1 ms 348 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 1 ms 348 KB Output is correct
22 Correct 4 ms 348 KB Output is correct
23 Correct 11 ms 564 KB Output is correct
24 Correct 16 ms 348 KB Output is correct
25 Correct 21 ms 592 KB Output is correct
26 Correct 21 ms 344 KB Output is correct
27 Correct 22 ms 348 KB Output is correct
28 Correct 21 ms 588 KB Output is correct
29 Correct 23 ms 592 KB Output is correct
30 Correct 23 ms 344 KB Output is correct
31 Correct 519 ms 1116 KB Output is correct
32 Correct 2206 ms 1892 KB Output is correct
33 Correct 3646 ms 2520 KB Output is correct
34 Correct 3653 ms 2512 KB Output is correct
35 Correct 3644 ms 2516 KB Output is correct
36 Correct 3622 ms 2480 KB Output is correct
37 Correct 3734 ms 2668 KB Output is correct
38 Correct 3712 ms 2588 KB Output is correct
39 Correct 3670 ms 2524 KB Output is correct
40 Correct 3668 ms 2520 KB Output is correct