Submission #724605

#	Time	Username	Problem	Language	Result	Execution time	Memory
724605		Szil	Balloons (CEOI11_bal)	C++14	100 / 100	261 ms	5660 KiB

bal

#include <bits/stdc++.h>

using ll = long long;
using ld = long double;
using namespace std;

struct Circle {
    ld x, r;
};

ld inter(ld x0, ld x1, ld r) {
    return ((x0-x1)*(x0-x1))/(4*r);
}

void solve() {
    int n; cin >> n;
    vector<Circle> circles;
    while (n--) {
        ld x, lim; cin >> x >> lim;
        int i;
        for (i = circles.size() - 1; i >= 0; i--) {
            Circle &c = circles[i];
            lim = min(lim, inter(x, c.x, c.r));
            if (lim < c.r) {
                break;
            }
        }
        while (circles.size() > i + 1)
            circles.pop_back();
        circles.push_back({x, lim});
        cout << fixed << setprecision(3) << lim << "\n";
    }
}

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0);
    int t = 1;
    // cin >> t;
    while (t--) {
        solve();
    }
    return 0;
}

Compilation message (stderr)

bal.cpp: In function 'void solve()':
bal.cpp:28:31: warning: comparison of integer expressions of different signedness: 'std::vector<Circle>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   28 |         while (circles.size() > i + 1)
      |                ~~~~~~~~~~~~~~~^~~~~~~

• 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