Submission #956907

#	Time	Username	Problem	Language	Result	Execution time	Memory
956907		dzzz	Balloons (CEOI11_bal)	C++17	100 / 100	157 ms	14420 KiB

bal

#include <bits/stdc++.h>
#define int long long
using namespace std;
const int maxn = 2e5 + 10;
struct ball{
    long double x, r;
};
int n;
ball a[maxn];
long double ra[maxn];

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i].x >> a[i].r;
        ra[i] = a[i].r;
    }
    deque <ball> d;
    for(int i = 1; i <= n; ++i) {
        while(!d.empty()) {
            ball tmp = d.back();
            ra[i] = min(ra[i], (a[i].x - tmp.x)*(a[i].x-tmp.x) / (4.0*tmp.r));
            if(ra[i] >= tmp.r) {
                d.pop_back();
            }
            else break;
        }
        d.push_back({a[i].x, ra[i]});
    }
    for(int i = 1; i <= n; ++i) {
        cout << fixed << setprecision(3)<< ra[i] << '\n';
    }
}

• 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