Submission #642816

#	Time	Username	Problem	Language	Result	Execution time	Memory
642816		daria	Balloons (CEOI11_bal)	C++17	30 / 100	567 ms	6504 KiB

bal

#include "bits/stdc++.h"
using namespace std;
#define N (1<<18) // 4194304
#define ld double
#define x first
#define r second
typedef pair<ld, ld> p;

ld rad(p b, p a){
 return (b.x - a.x)*(b.x - a.x)/(4*a.r);
}

int main(){
 int n; cin >> n;
 vector<p> v(n);
 vector<ld> r(n);
 for(int i=0; i<n; ++i){ ld a, b; cin >> a >> b; v[i] = {a, b}; }
 stack<p> st;
 for(int i=0; i<n; ++i){
  ld curr = v[i].r;
  while(!st.empty()){
   ld check = rad(v[i], st.top());
   curr = min(curr,check);
   if(check>=st.top().r){ st.pop(); continue; }
   else break;
  }
  r[i] = curr;
  st.push({v[i].x, curr});
 }
 cout << fixed << setprecision(3);
 for(int i=0; i<n; ++i) cout << r[i] << endl;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10