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Submission #607262

# Submission time Handle Problem Language Result Execution time Memory
607262 2022-07-26T14:11:00 Z Duy_e Balloons (CEOI11_bal) C++14
60 / 100
 2000 ms 2340 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 c = r[i] + r[j]; c = c * c;
    double a = r[i] - r[j]; a = a * a;
    double b = x[j] - x[i]; b = b * b;
    // cout << a << ' ' << b << ' ' << c << '\n';
    return c - a >= b;
}

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];
        for (int j = i - 1; j >= 1; j --)
            if (touch(j, i)) {
                r[i] = min(r[i], cal(j, i));
            }
        cout << setprecision(3) << fixed << r[i] << '\n';
    }

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

Compilation message

bal.cpp:51:9: warning: "/*" within comment [-Wcomment]
   51 | /**  /\_/\
      |

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 380 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 342 ms 708 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1939 ms 1620 KB 50000 numbers
2 Correct 1925 ms 2340 KB 49912 numbers

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2070 ms 1460 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2040 ms 1416 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2064 ms 1556 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2077 ms 1524 KB Time limit exceeded
2 Halted 0 ms 0 KB -