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Submission #312560

# Submission time Handle Problem Language Result Execution time Memory
312560 2020-10-13T17:32:51 Z fatemetmhr Balloons (CEOI11_bal) C++17
20 / 100
 292 ms 11000 KB 
#include<bits/stdc++.h>
#define sanastd using namespace std
sanastd;

const int MAXN = 1000 * 1000 + 10;
const long long INF = 1LL * 1000 * 1000 * 1000 * 1000 * 1000 * 1000 + 10;

int n, r[MAXN], x[MAXN];
long double ans[MAXN];
stack <int> balloon;

long double ssq (long double m)
{
  	long double lo = 0, hi = m + 1;
  	while(hi - lo > 0.0001){
      	long double mid = (hi + lo) / 2.0;
      	if(mid * mid > m) hi = mid;
      	else lo = mid;
    }
  	return lo;
}
bool check(int ind1, int ind2, double mid)
{
    long double d = (x[ind1] - x[ind2]) * (x[ind1] - x[ind2]) + (ans[ind2] - mid) * (ans[ind2] - mid);
    if(ssq(d) < mid + ans[ind2]) return 0;
    else return 1;
}
int main ()
{
    cout<<fixed<<setprecision(15);
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);

    cin >> n >> x[0] >> r[0];
    balloon.push(0);
    ans[0] = r[0];
    cout << r[0] << endl;
    for(int i = 1; i < n; i++){
        cin >> x[i] >> r[i];
        ans[i] = r[i];
        while(!balloon.empty() and ans[balloon.top()] <= ans[i]){
            long double d = (x[i] - x[balloon.top()]) * (x[i] - x[balloon.top()]) / (4 * ans[balloon.top()]);
            ans[i] = min(ans[i], d);
            if(ans[i] >= ans[balloon.top()]) balloon.pop();
        }
        if(!balloon.empty()){
            long double d = (x[i] - x[balloon.top()]) * (x[i] - x[balloon.top()]) / (4 * ans[balloon.top()]);
            ans[i] = min(ans[i], d);
        }
        balloon.push(i);
        cout << ans[i] << '\n';
    }
    return 0;
}

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB 10 numbers

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 384 KB 2nd numbers differ - expected: '252735385.4379999936', found: '0.9334151241', error = '252735384.5045848787'

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 384 KB 505 numbers

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 416 KB 506th numbers differ - expected: '365.0000000000', found: '-2481854.0646065241', error = '2482219.0646065241'

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 30 ms 1408 KB 655th numbers differ - expected: '591.0000000000', found: '-2402336.3030539565', error = '2402927.3030539565'

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 84 ms 2808 KB 4th numbers differ - expected: '15396.0000000000', found: '-8148.5509720554', error = '23544.5509720554'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 140 ms 5364 KB 7234th numbers differ - expected: '7160.0000000000', found: '-2398141.9988687783', error = '2405301.9988687783'

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 177 ms 6264 KB 4643rd numbers differ - expected: '2427.0000000000', found: '-2355611.7017843765', error = '2358038.7017843765'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 227 ms 8240 KB 1734th numbers differ - expected: '1856.0220000000', found: '-2324667.3863617540', error = '2326523.4083617539'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 292 ms 11000 KB 2723rd numbers differ - expected: '859.0470000000', found: '-2333711.4845473454', error = '2334570.5315473452'
2 Halted 0 ms 0 KB -