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Submission #607242

# Submission time Handle Problem Language Result Execution time Memory
607242 2022-07-26T13:50:22 Z Duy_e Balloons (CEOI11_bal) C++14
0 / 100
 183 ms 8012 KB 
#include <bits/stdc++.h>
#define ll long long
#define pii pair<ll, ll>
#define st first
#define nd second
#define file "test"
using namespace std;
const long long INF = 1e18;
const long long N = 2e5 + 5;
const long long eps = 1e-6;
stack <int> st;
ll x[N], n;
double r[N];

bool touch(int i, int j) {
    double a = r[i] - r[j], b = x[j] - x[i];
    double c = a * a + b * b;
    double sum = r[i] + r[j];
    return sum * sum <= c;
}

double cal(int i, int j) {
    if (i == 0) return r[j];
    double a = r[i], b = x[j] - x[i];
    double ans = b * b / ((double)4.0 * a);
    return min(ans, r[j]);
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    // #ifndef ONLINE_JUDGE
    //     freopen(file".inp", "r", stdin); freopen(file".out", "w", stdout);
    // #endif
    
    cin >> n;

    st.push(0);
    for (int i = 1; i <= n; i ++) {
        cin >> x[i] >> r[i];
        while (st.size() > 1 && !touch(st.top(), i) && r[i] > r[st.top()]) st.pop();
        // cout << st.top() << ' ';
        r[i] = cal(st.top(), i);
        st.push(i);
        cout << setprecision(3) << fixed << r[i] << '\n';
    }

    return 0;
}    
/**  /\_/\
*   (= ._.)
*   / >🍵 \>🍮
**/

Compilation message

bal.cpp:50:9: warning: "/*" within comment [-Wcomment]
   50 | /**  /\_/\
      |

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB 4th numbers differ - expected: '1.8420000000', found: '87.0000000000', error = '85.1580000000'
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 340 KB 2nd numbers differ - expected: '252735385.4379999936', found: '1000000000.0000000000', error = '747264614.5620000362'
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB 3rd numbers differ - expected: '0.0420000000', found: '3.0000000000', error = '2.9580000000'
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 344 KB 3rd numbers differ - expected: '121.0000000000', found: '123.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 19 ms 952 KB 3rd numbers differ - expected: '211.0000000000', found: '213.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 54 ms 2332 KB 2nd numbers differ - expected: '15398.0000000000', found: '24984.0000000000', error = '9586.0000000000'
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 101 ms 4344 KB 2nd numbers differ - expected: '7937.0000000000', found: '10352.0000000000', error = '2415.0000000000'
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 118 ms 5040 KB 6th numbers differ - expected: '5053.0000000000', found: '5055.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 166 ms 6624 KB 3rd numbers differ - expected: '1872.0000000000', found: '1874.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 183 ms 8012 KB 3rd numbers differ - expected: '2960.0000000000', found: '2962.0000000000', error = '2.0000000000'
2 Halted 0 ms 0 KB -