Submission #1030143

#	Time	Username	Problem	Language	Result	Execution time	Memory
1030143		ArthuroWich	Balloons (CEOI11_bal)	C++17	100 / 100	306 ms	11860 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define int long long int
struct bal {
    int x, r;
};
void solve() {
    int n;
    cin >> n;
    vector<long double> ans(n);
    vector<bal> p(n);
    for (int i = 0; i < n; i++) {
        cin >> p[i].x >> p[i].r;
        ans[i] = p[i].r;
    }
    vector<pair<long double, int>> st;
    for (int i = 0; i < n; i++) {
        while(!st.empty()) {
            long double delta = abs(p[i].x-p[st.back().second].x);
            ans[i] = min(ans[i], (long double) delta*delta/((long double)4.0L*st.back().first));
            if (ans[i] >= st.back().first) {
                st.pop_back();
            } else {
                break;
            }
        }
        st.push_back({ans[i], i});
    }
    for (int i = 0; i < n; i++) {
        cout << fixed << setprecision(3) << ans[i] << endl;
    }
}
int32_t main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    int t;
    t = 1;
    while(t--) {
        solve();
    }
}

• 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