Submission #1217438

#	Time	Username	Problem	Language	Result	Execution time	Memory
1217438		KALARRY	Balloons (CEOI11_bal)	C++20	100 / 100	85 ms	2628 KiB

bal

//chockolateman

#include<bits/stdc++.h>

using namespace std;

int N;

long double give_R(long long x,long long a,long double b)
{
    long double R = (x-a)*(x-a)/(4.0*b);
    return R;
}

int main()
{
    scanf("%d",&N);
    stack<pair<long long,long double>> ord;
    for(long long x,r,i = 1 ; i <= N ; i++)
    {
        scanf("%lld%lld",&x,&r);
        long double R = r;
        while(!ord.empty())
        {
            long long a = ord.top().first;
            long double b = ord.top().second;
            long double cur = give_R(x,a,b);
            R = min(R,cur);
            if(R >= b)
                ord.pop();
            else
                break;
        }
        printf("%.7Lf\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: 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