Submission #464026

#	Time	Username	Problem	Language	Result	Execution time	Memory
464026		dutch	Balloons (CEOI11_bal)	C++17	100 / 100	147 ms	4356 KiB

bal

#include <bits/stdc++.h>
using namespace std;

#ifdef _WIN32
#define getchar _getchar_nolock
#else
#define getchar getchar_unlocked
#endif

struct readInt{
	readInt& operator>>(int &I){
		char J = I = 0;
		while(J < 48) J = getchar();
		while(J > 47) I = I * 10 + J - 48, J = getchar();
		return *this;
	}
#define cin __read__
} __read__;

const int LIM = 2e5;

int n, x[LIM], st[LIM+1], *p = st;
double y[LIM];

signed main(){
	cin >> n;
	
	cout << fixed << setprecision(4);

	for(int i=0, j; i<n; ++i){
		cin >> x[i] >> j; y[i] = j;
		while(p != st){
			y[i] = min(y[i], (double(x[*p] - x[i]) * double(x[*p] - x[i])) / (4.0 * y[*p]));
			if(y[*p] < y[i]) --p;
			else break;
		}
		cout << y[*(++p) = i] << '\n';
	}
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10