Submission #1006935

#	Time	Username	Problem	Language	Result	Execution time	Memory
1006935		jor0715	Balloons (CEOI11_bal)	C++17	100 / 100	133 ms	11860 KiB

bal

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

#define MOD 1000000007
#define ll long long
#define endl "\n"
#define range(i,a,b,c) for(int i=a;i!=b;i+=c)
#define vi vector<int>
#define vll vector<ll>

long double r2(long double r1, long double x1, long double x2){
	int dis = abs(x2-x1);
	return 1.0*pow(dis,2)/(4*r1);
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	
	cout << fixed << setprecision(3);
	
	int N;
	cin >> N;
	vector<long double> x(N);
	vector<long double> r(N);
	range(i,0,N,1){
		cin >> x[i] >> r[i];
	}
	
	stack<pair<long double, int>> st;
	
	st.push({r[0],x[0]});
	cout << r[0] << endl;
	
	range(i,1,N,1){
		long double minn = min(r[i], r2(st.top().first, st.top().second, x[i]));
		
		while(st.top().first <= minn){
			st.pop();
			if(st.empty()) break;
			minn = min(minn, r2(st.top().first, st.top().second, x[i]));
		}
		
		st.push({minn, x[i]});
		cout << minn << endl;
	}
	
	
	return 0;
}

• 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