Submission #578779

#	Time	Username	Problem	Language	Result	Execution time	Memory
578779		DanielQiu	Balloons (CEOI11_bal)	C++17	100 / 100	606 ms	8736 KiB

bal

#include <bits/stdc++.h>
using namespace std;
#define r first
#define x second
int main(){
        //freopen("test.in", "r", stdin);
        int n;
        cin>>n;
        stack<pair<long double, long double>> rd;//{radius, x coord}
        for(int i = 0; i<n; i++){
                long double x, r;
                cin>>x>>r;
                long double cur = r;
                while(!rd.empty()){
                        long double dist= (rd.top().x-x)*(rd.top().x-x)/(4*rd.top().r);
                        cur = min(cur, dist);
                        if(cur>rd.top().r){
                                rd.pop();
                        }else{
                                break;
                        }
                }
                rd.push({cur, x});
                printf("%.3Lf\n",cur);
        }
}

• 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