Submission #1217430

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217430		KALARRY	Balloons (CEOI11_bal)	C++20	10 / 100	71 ms	2116 KiB

bal

//chockolateman

#include<bits/stdc++.h>

using namespace std;

int N;

double give_R(long long x,long long a,double b)
{
    double R = (x-a)*(x-a)/(4*b);
    return R;
}

int main()
{
    scanf("%d",&N);
    stack<pair<int,int>> ord;
    for(long long x,r,i = 1 ; i <= N ; i++)
    {
        scanf("%lld%lld",&x,&r);
        double R = r;
        while(!ord.empty())
        {
            long long a = ord.top().first;
            double b = ord.top().second;
            double cur = give_R(x,a,b);
            R = min(R,cur);
            if(R > b)
                ord.pop();
            else
                break;
        }
        printf("%.4lf\n",R);
        ord.push({x,R});
    }
    return 0;
}

Compilation message (stderr)

bal.cpp: In function 'int main()':
bal.cpp:17:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |     scanf("%d",&N);
      |     ~~~~~^~~~~~~~~
bal.cpp:21:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         scanf("%lld%lld",&x,&r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 10 / 10
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• Subtask 10: 0 / 10