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Submission #945457

# Submission time Handle Problem Language Result Execution time Memory
945457 2024-03-13T20:19:30 Z nolqf Balloons (CEOI11_bal) C++14
100 / 100
 154 ms 11672 KB 
#include <bits/stdc++.h>

using namespace std;
using ld = long double;

const int DIM = 2e5 + 5;

ld x[DIM], r[DIM];

inline ld get( int i, int j ) {
  return (x[i] - x[j]) * (x[i] - x[j]) / (4.0 * r[j]);
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int n;

  cin >> n;
  for ( int i = 1; i <= n; ++i ) {
	cin >> x[i] >> r[i];
  }
  vector<int> stk;
  for ( int i = 1; i <= n; ++i ) {
	while ( stk.size() ) {
	  r[i] = min(r[i], get(i, stk.back()));
      if ( r[i] < r[stk.back()] ) break;
	  stk.pop_back();
	}
	stk.push_back(i);
  }

  cout << fixed << setprecision(3);
  for ( int i = 1; i <= n; ++i ) {
	cout << r[i] << "\n";
  }
  return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2396 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2396 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 4700 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 40 ms 5212 KB 50000 numbers
2 Correct 37 ms 5804 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 79 ms 5968 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 91 ms 6492 KB 115362 numbers
2 Correct 87 ms 8532 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 123 ms 7252 KB 154271 numbers
2 Correct 152 ms 11672 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 153 ms 8268 KB 200000 numbers
2 Correct 154 ms 11620 KB 199945 numbers