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Submission #521704

# Submission time Handle Problem Language Result Execution time Memory
521704 2022-02-02T19:02:58 Z AmirElarbi Balloons (CEOI11_bal) C++14
0 / 100
 3 ms 384 KB 
#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e16
#define eps 1e-7
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
#define V 450
using namespace std;
const int MOD = 1e9+7;
const int nax = 2e5+5;
ve<pair<long double,long double>> s;
long double r[nax];
int main(){ 
    optimise;
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif
    int n;
    cin >> n;
    for (int i = 0; i < n; ++i)
    {
        long double x,mr;
        cin >> x >> mr;
        s.pb({x,mr});
    }
    stack<int> st;
    for (int i = 0; i < n; ++i)
    {
        long double mx = s[i].se;
        while (!st.empty())
        {
            pair<long double,long double> a = s[st.top()];
            long double b = (long double)((s[i].fi-a.fi)*(s[i].fi-a.fi))/(long double) (4*r[st.top()]);
            mx = min(b,mx);
            if(mx >= r[st.top()]){
                st.pop();
            } else {
                break;
            }
        }
        st.push(i);
        r[i] = mx;
        cout <<fixed << setprecision(3) << mx << endl;
    }
}

Compilation message

bal.cpp: In function 'int main()':
bal.cpp:29:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   29 |         freopen("input.txt", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
bal.cpp:30:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   30 |         freopen("output.txt", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #6
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 384 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #7
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #8
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #9
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -

Subtask #10
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 332 KB Unexpected end of file - double expected
2 Halted 0 ms 0 KB -