Submission #442893

#	Time	Username	Problem	Language	Result	Execution time	Memory
442893		NintsiChkhaidze	Balloons (CEOI11_bal)	C++14	100 / 100	244 ms	11708 KiB

bal

#include <bits/stdc++.h>
#define s second
#define f first
using namespace std;
const int N = 200005;
long double a[N],b[N];
stack <pair<long double,long double> > st;
int main() {
  ios_base::sync_with_stdio(0),cin.tie(NULL),cout.tie(NULL);
  int n;
  cin>>n;

  for (int i = 1; i <= n; i++)
    cin>>a[i]>>b[i];
  
  printf("%.3Lf\n",b[1]);
  st.push({a[1],b[1]});
  for (int i = 2; i <= n; i++){
      long double x = a[i],r = b[i];
      while(st.size()){
        long double R = st.top().s,X = st.top().f;
        long double y = ((x - X)*(x - X))/(4*R);
        r = min(r,y);
        if (r >= R) st.pop();
        else break;
      }
      st.push({a[i],r});
      printf("%.3Lf\n",r);
  }
}

• 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