oj.uz

Submission #216471

# Submission time Handle Problem Language Result Execution time Memory
216471 2020-03-27T10:50:09 Z theStaticMind Circle selection (APIO18_circle_selection) C++14
0 / 100
 6 ms 512 KB 
#include<bits/stdc++.h>
#define pb push_back
#define ii pair<int,int>
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define INF 100000000000000000
#define modulo 1000000007
#define mod 998244353
#define int long long int
using namespace std;

struct circle{
	int x, y, r, id;
	bool operator<(const circle& a)const{
		return x < a.x || (x == a.x && id < a.id);
	}
};

int dist(circle& a, circle& b){
	int x = a.x - b.x;
	int y = a.y - b.y;
	return x * x + y * y;
}

bool isect(circle& a, circle& b){
	return dist(a, b) <= (a.r + b.r) * (a.r + b.r);
}

int32_t main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);

	freopen("q.gir", "r", stdin);
	freopen("q.cik", "w", stdout);
	
	vector<circle> X;
	vector<circle> data;
	vector<int> seq;

	int n;
	cin >> n;
	vector<int> ans(n, -1);

	for(int i = 0; i < n; i++){
		int x, y, r;
		cin >> x >> y >> r; swap(x, y);
		X.pb({x, y, r, i});
		data.pb({x, y, r, i});
	}
	sort(all(data), [&](circle a, circle b){return a.r > b.r || (a.r == b.r && a.id < b.id);});

	for(int i = 0; i < n; i++) seq.pb(i);
	sort(all(seq), [&](int x, int y){return X[x].x < X[y].x;});

	vector<int> ptr(n);
	for(int i = 0; i < n; i++) ptr[seq[i]] = i;

	for(auto c : data){
		if(ans[c.id] >= 0) continue;

		for(int j = ptr[c.id] + 1; j < n && ans[seq[j]] == -1 && isect(X[c.id], X[seq[j]]); j++){
			ans[seq[j]] = c.id;
		}
		for(int j = ptr[c.id] - 1; j >= 0 && ans[seq[j]] == -1 && isect(X[c.id], X[seq[j]]); j--){
			ans[seq[j]] = c.id;
		}
		ans[c.id] = c.id;
	}

	for(int i = 0; i < n; i++){
		cout << ans[i] + 1 << " ";
	}
	
}

Compilation message

circle_selection.cpp: In function 'int32_t main()':
circle_selection.cpp:33:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("q.gir", "r", stdin);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
circle_selection.cpp:34:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen("q.cik", "w", stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 384 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 30.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 512 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 6 ms 512 KB Output isn't correct
2 Halted 0 ms 0 KB -