oj.uz

답안 #202973

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
202973 2020-02-18T20:08:29 Z Neklixx Balloons (CEOI11_bal) C++14
20 / 100
 178 ms 9056 KB 
#include <bits/stdc++.h>
#define pb push_back
#define mp make_pair
#define F first
#define S second
#define all(v) v.begin(), v.end()
#define sh cin.tie(0); cin.sync_with_stdio(0); cout.tie(0);
#define FILE freopen("test.in", "r", stdin);
#define vprint(v) for (int ii = 0; ii < v.size(); ii++){cout << v[ii] << " ";}
#define debugv(v) if (v.size() != 0) {cout << "[ "; for (int __ = 0; __ < (int)(v.size()) - 1; __++){cout << v[__] << ", ";} cout << v[(int)(v.size()) - 1] << " ]" << endl;} else {cout << "[]" << endl;}
#define debug cout << "-----------------------------------------------" << endl;
#define print1(a) cout << "{ " << a << " }" << endl;
#define print2(a, b) cout << "{ " << a << ", " << b << " }" << endl;
#define print3(a, b, c) cout << "{ " << a << ", " << b << ", " << c << " }" << endl;
#define print4(a, b, c, d) cout << "{ " << a << ", " << b << ", " << c << ", " << d << " }" << endl;
using namespace std;
#define int long long
const double INF = 1e11 + 228;
const int MAXN = 2e5 + 228;
double ans[MAXN];

double intersect1(double x1, double x2, double t1, double t2) {
	//print4(x1, x2, t1, (((x2 / (2 * t2)) - (x1 / (2 * t1))) * 2 * t1 * t2) / (t1 - t2));
	return ((((x2 / (2 * t2)) - (x1 / (2 * t1))) * 2 * t1 * t2) / (t1 - t2));
} 

signed main()
{
#ifdef LOCAL
    FILE;
#endif
    sh;
	int n;
	cin >> n;
	vector<pair<int, int>> v;
	for (int i = 0; i < n; i++) {
		int aa, bb;
		cin >> aa >> bb;
		v.pb({aa, bb});
	}    

	vector<pair<double, double>> s;
	vector<double> x1;
	for (int i = 0; i < n; i++) {
		double now = v[i].S;
		int id = upper_bound(all(x1), (double)v[i].F) - x1.begin();
		
		if (s.size() > 0) {
			//print4("t", s.size(), id, x1.size());
			pair<double, double> to = s[s.size() - id - 1];
			double cl = (to.S * to.S) / (4 * to.F) + (v[i].F * v[i].F) / (4 * to.F) - (2 * v[i].F * to.S) / (4 * to.F);
			now = min(now, cl);
		}
		while (s.size() > 0 && s.back().F <= now) {
			s.pop_back();
		}
		while (x1.size() + 1 > s.size() && s.size() != 0) {
			x1.pop_back();
		}
		if (s.size() == 0) {
			x1.clear();
		}
		ans[i] = now;
		//print1(now);
		if (s.size() > 0) {
			x1.pb(intersect1(s.back().S, (double)v[i].F, sqrt(s.back().F), sqrt(now)));
		}
		//print1("ok");
		s.pb({now, (double)v[i].F});
	}

	for (int i = 0; i < n; i++) {
		cout << fixed << setprecision(4) << ans[i] << '\n';
	}
    return 0;
}

Subtask #1
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 376 KB 10 numbers

Subtask #2
10.0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Correct 5 ms 376 KB 2 numbers

Subtask #3
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 5 ms 396 KB 15th numbers differ - expected: '0.8630000000', found: '11.0021000000', error = '10.1391000000'

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 408 KB 114th numbers differ - expected: '39.0180000000', found: '56.0000000000', error = '16.9820000000'

Subtask #5
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 23 ms 1396 KB 196th numbers differ - expected: '100.7250000000', found: '111.0000000000', error = '10.2750000000'

Subtask #6
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 51 ms 3088 KB 6163rd numbers differ - expected: '8601.0000000000', found: '8602.0000000000', error = '1.0000000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 98 ms 5352 KB 3653rd numbers differ - expected: '3933.0000000000', found: '8499.0000000000', error = '4566.0000000000'

Subtask #8
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 113 ms 6248 KB 4249th numbers differ - expected: '426.0010000000', found: '427.0000000000', error = '0.9990000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 151 ms 7780 KB 1473rd numbers differ - expected: '284.0010000000', found: '285.0000000000', error = '0.9990000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 178 ms 9056 KB 1919th numbers differ - expected: '860.0000000000', found: '867.0000000000', error = '7.0000000000'
2 Halted 0 ms 0 KB -