Submission #18496

#	Time	Username	Problem	Language	Result	Execution time	Memory
18496		eaststar	맛있는 과자 (kriii3_A)	C++14	33 / 33	0 ms	1192 KiB

A

#include <stdio.h>
#include <math.h>
int main(){
    int i,n;
    double a,b,c;
    long long k,t=1;
    scanf("%lf%lf%d%lld",&a,&b,&n,&k);
    if(a>b)c=a,a=b,b=c;
    for(i=0;i<n;){
        if(k<=t)break;
        k-=t;
        t=t*(n-i)/(++i);
    }
    printf("%.8lf",log(a*b/2)+i*2*log(a)+(n-i)*2*log(b)-n*log(a*a+b*b));
    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 23 / 23