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Submission #134408

# Submission time Handle Problem Language Result Execution time Memory
134408 2019-07-22T16:17:02 Z Milki Balloons (CEOI11_bal) C++14
30 / 100
 283 ms 8216 KB 
#include<bits/stdc++.h>
using namespace std;

#define FOR(i, a, b) for(int i = a; i < b; ++i)
#define REP(i, n) FOR(i, 0, n)
#define _ << " " <<
#define sz(x) ((int) x.size())
#define pb(x) push_back(x)
#define TRACE(x) cerr << #x << " = " << x << endl

typedef long long ll;
typedef long double ld;
typedef pair<ld, ld> point;

const int MAXN = 2e5 + 5;
const ld eps = 1e-12;

int n;
ld x[MAXN], r[MAXN];
stack <point> stek;

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

  cin >> n;
  REP(i, n){
    cin >> x[i] >> r[i];
    ld radijus = r[i];

    while(sz(stek)){
      ld xx = stek.top().first - x[i];
      xx *= xx;
      radijus = min(radijus, ( xx ) / ((ld)4 * stek.top().second));

      if(radijus > stek.top().second - eps)
        stek.pop();
      else{
        cout << setprecision(3) << fixed << radijus << "\n";
        stek.push(point(x[i], radijus));
        break;
      }
    }
    if(!sz(stek)){
      cout << setprecision(3) << fixed << radijus << "\n";
      stek.push(point(x[i], r[i]));
    }
  }
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB 2 numbers

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB 8th numbers differ - expected: '0.3800000000', found: '0.3400000000', error = '0.0400000000'

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 508 KB 2000 numbers

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 30 ms 1148 KB 2954th numbers differ - expected: '267.9930000000', found: '58.1120000000', error = '209.8810000000'

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 73 ms 2712 KB 14055th numbers differ - expected: '15399.0000000000', found: '15379.0260000000', error = '19.9740000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 151 ms 4604 KB 7288th numbers differ - expected: '7939.1490000000', found: '7931.0080000000', error = '8.1410000000'

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 180 ms 5368 KB 4716th numbers differ - expected: '5060.5780000000', found: '5034.1380000000', error = '26.4400000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 252 ms 6712 KB 1773rd numbers differ - expected: '0.1050000000', found: '0.1030000000', error = '0.0020000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 283 ms 8216 KB 2791st numbers differ - expected: '0.1790000000', found: '0.1770000000', error = '0.0020000000'
2 Halted 0 ms 0 KB -