oj.uz

Submission #1109179

# Submission time Handle Problem Language Result Execution time Memory
1109179 2024-11-06T07:15:30 Z dzhoz0 Balloons (CEOI11_bal) C++17
100 / 100
 151 ms 11344 KB 
/*
    ghmt the cutie :3
          UwU
*/

#include <bits/stdc++.h>
#include <iomanip>
using namespace std;

#define int long long
#define INF 1e18
#define f first
#define s second
#define pii pair<int, int>
#define vi vector<int>

const int MOD = 1'000'000'000 + 7;

void setIO(string name = "")
{
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
#ifdef LOCAL
    freopen("inp.txt", "r", stdin);
    freopen("out.txt", "w", stdout);
#else
    if (!name.empty())
    {
        freopen((name + ".INP").c_str(), "r", stdin);
        freopen((name + ".OUT").c_str(), "w", stdout);
    }
#endif
}

const int MAXN = 2e5;
int n;
double x[MAXN + 5], r[MAXN + 5];
double res[MAXN + 5];

double sq(long double x) {
    return x * x;            
}
void solve()
{
    cin >> n;
    for(int i = 1; i <= n; i++) {
        cin >> x[i] >> r[i];
    }
    vi st;
    for(int i = 1; i <= n; i++) { 
        // cout << st << '\n';
        while(!st.empty()) {
            r[i] = min(r[i], sq(x[i] - x[st.back()]) / (4 * r[st.back()]));
            if(r[i] >= r[st.back()]) st.pop_back();
            else break;
        }
        st.push_back(i);
    }
    cout << fixed << setprecision(9);
    for(int i = 1; i <= n; i++) cout << r[i] << '\n';
}
signed main()
{
    setIO();
    int t = 1;
    // cin >> t;
    while (t--)
        solve();
}

Compilation message

bal.cpp: In function 'void setIO(std::string)':
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((name + ".INP").c_str(), "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((name + ".OUT").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 4432 KB 10 numbers

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4432 KB 2 numbers

Subtask #3
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 4432 KB 505 numbers

Subtask #4
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 4432 KB 2000 numbers

Subtask #5
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 4940 KB 20000 numbers

Subtask #6
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 6224 KB 50000 numbers
2 Correct 33 ms 6052 KB 49912 numbers

Subtask #7
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 73 ms 7496 KB 100000 numbers

Subtask #8
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 86 ms 8008 KB 115362 numbers
2 Correct 87 ms 8252 KB 119971 numbers

Subtask #9
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 119 ms 9160 KB 154271 numbers
2 Correct 134 ms 11344 KB 200000 numbers

Subtask #10
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 151 ms 10312 KB 200000 numbers
2 Correct 128 ms 11200 KB 199945 numbers