Submission #858124

#	Time	Username	Problem	Language	Result	Execution time	Memory
858124		ColourAttila	Balloons (CEOI11_bal)	C++17	10 / 100	385 ms	6772 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define InTheNameOfGod ios::sync_with_stdio(0);cin.tie(0); cout.tie(0);
using ll = long long;

const ll maxN = 2e5 + 5;
const ll MOD = 1e12 + 7;
const ll INF = 1e9 + 7;

double val(double x, double r) {
    return x*x/4.0/r;
}

int main() {
   InTheNameOfGod;

    ll n;
    cin >> n;

    vector<pair<double, double> > v(n);
    for(ll i = 0; i < n; i++) {
        cin >> v[i].first >> v[i].second;
    }
    vector<ll> ind;
    ind.push_back(0);
    vector<double> mo = {v[0].second};
    for(ll i = 1; i < n; i++) {
        double mini = val(v[i].first-v[ind[0]].first, mo[ind[0]]);
        int l = 0, r = ind.size()-1;
        while(l <= r) {
            int mid = (l+r)/2;
            if(val(v[i].first-v[ind[mid]].first, mo[ind[mid]]) < mini) {
                mini = val(v[i].first-v[ind[mid]].first, mo[ind[mid]]);
                l = mid+1;
            }
            else r = mid-1;
        }
        mini = min(mini, v[i].second);
        mo.push_back(mini);
        while(!ind.empty() && mo[ind.back()] < mini) ind.pop_back();
        ind.push_back(i);
    }
    cout << fixed << setprecision(3);
    for(ll i = 0; i < n; i++) cout << mo[i] << endl;
    return 0;
}

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 10
• Subtask 10: 0 / 10