Submission #1109179

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109179		dzhoz0	Balloons (CEOI11_bal)	C++17	100 / 100	151 ms	11344 KiB

bal

/*
    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 (stderr)

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 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10