CODE FESTIVAL 2016 Final

Submission #992337

Source codeソースコード

#include<cstdio>
#include<algorithm>

using namespace std;

const long long inf = 1e15;

long long mul(long long a, long long b){
	if(a == 0 || b == 0) return 0;
	long long tmp = inf / a;
	if(tmp <= b) return inf;
	long long x = a * b;
	return min(x, inf);
}

long long ex(long long a, int e){
	if(e == 0) return 1;
	long long tmp = ex(a, e / 2);
	tmp = mul(tmp, tmp);
	if(e % 2 == 1) tmp = mul(tmp, a);
	return tmp;
}

long long N, A;

long long solve(){
	long long ans = N;
	for(int n = 2; n <= 40; ++n){
		long long lb = 1, ub = N;
		while(ub - lb > 1){
			long long mid = (ub + lb) / 2;
			long long val = ex(mid, n);
			if(val <= N) lb = mid;
			else ub = mid;
		}
		if(lb == 1) continue;
		else{
			long long x = lb, y = lb + 1;
			int lb = -1, ub = n;
			while(ub - lb > 1){
				int mid = (ub + lb) / 2;
				long long val = mul(ex(x, n - mid), ex(y, mid));
				if(val >= N){
					ub = mid;
				}else{
					lb = mid;
				}
			}
			long long tmp = x * (n - ub) + y * ub + A * (n - 1);
			ans = min(ans, tmp);
		}
	}
	return ans;
}

int main(){
	scanf("%lld%lld", &N, &A);
	long long ans = solve();
	printf("%lld\n", ans);
	return 0;
}

Submission

Task問題 E - Cookies
User nameユーザ名 013_wo01
Created time投稿日時
Language言語 C++14 (GCC 5.4.1)
Status状態 AC
Score得点 1000
Source lengthソースコード長 1201 Byte
File nameファイル名
Exec time実行時間 2 ms
Memory usageメモリ使用量 128 KB

Compiler messageコンパイルメッセージ

./Main.cpp: In function ‘int main()’:
./Main.cpp:57:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%lld%lld", &N, &A);
^

Test case

Set

Set name Score得点 / Max score Cases
sample - sample-01.txt,sample-02.txt,sample-03.txt
dataset1 500 / 500 sample-01.txt,01-01.txt,01-02.txt,01-03.txt,01-04.txt,01-05.txt,01-06.txt,01-07.txt,01-08.txt,01-09.txt,01-10.txt,01-11.txt,01-12.txt,01-13.txt,01-14.txt,01-15.txt,01-16.txt,01-17.txt,01-18.txt,01-19.txt,01-20.txt,01-21.txt,01-22.txt,01-23.txt,01-24.txt,01-25.txt,01-26.txt
dataset2 500 / 500 sample-01.txt,sample-02.txt,sample-03.txt,01-01.txt,01-02.txt,01-03.txt,01-04.txt,01-05.txt,01-06.txt,01-07.txt,01-08.txt,01-09.txt,01-10.txt,01-11.txt,01-12.txt,01-13.txt,01-14.txt,01-15.txt,01-16.txt,01-17.txt,01-18.txt,01-19.txt,01-20.txt,01-21.txt,01-22.txt,01-23.txt,01-24.txt,01-25.txt,01-26.txt,02-01.txt,02-02.txt,02-03.txt,02-04.txt,02-05.txt,02-06.txt,02-07.txt,02-08.txt,02-09.txt,02-10.txt,02-11.txt,02-12.txt,02-13.txt,02-14.txt,02-15.txt,02-16.txt,02-17.txt,02-18.txt,02-19.txt,02-20.txt,02-21.txt,02-22.txt,02-23.txt,02-24.txt,02-25.txt,02-26.txt,02-27.txt,02-28.txt,02-29.txt,02-30.txt,02-31.txt,02-32.txt,02-33.txt,02-34.txt,02-35.txt,02-36.txt,02-37.txt,02-38.txt,02-39.txt,02-40.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
01-01.txt AC 1 ms 128 KB
01-02.txt AC 1 ms 128 KB
01-03.txt AC 1 ms 128 KB
01-04.txt AC 1 ms 128 KB
01-05.txt AC 1 ms 128 KB
01-06.txt AC 1 ms 128 KB
01-07.txt AC 1 ms 128 KB
01-08.txt AC 1 ms 128 KB
01-09.txt AC 1 ms 128 KB
01-10.txt AC 1 ms 128 KB
01-11.txt AC 1 ms 128 KB
01-12.txt AC 1 ms 128 KB
01-13.txt AC 1 ms 128 KB
01-14.txt AC 1 ms 128 KB
01-15.txt AC 1 ms 128 KB
01-16.txt AC 1 ms 128 KB
01-17.txt AC 1 ms 128 KB
01-18.txt AC 1 ms 128 KB
01-19.txt AC 1 ms 128 KB
01-20.txt AC 1 ms 128 KB
01-21.txt AC 1 ms 128 KB
01-22.txt AC 1 ms 128 KB
01-23.txt AC 1 ms 128 KB
01-24.txt AC 1 ms 128 KB
01-25.txt AC 1 ms 128 KB
01-26.txt AC 1 ms 128 KB
02-01.txt AC 1 ms 128 KB
02-02.txt AC 1 ms 128 KB
02-03.txt AC 1 ms 128 KB
02-04.txt AC 1 ms 128 KB
02-05.txt AC 1 ms 128 KB
02-06.txt AC 1 ms 128 KB
02-07.txt AC 1 ms 128 KB
02-08.txt AC 1 ms 128 KB
02-09.txt AC 1 ms 128 KB
02-10.txt AC 1 ms 128 KB
02-11.txt AC 1 ms 128 KB
02-12.txt AC 2 ms 128 KB
02-13.txt AC 2 ms 128 KB
02-14.txt AC 1 ms 128 KB
02-15.txt AC 2 ms 128 KB
02-16.txt AC 1 ms 128 KB
02-17.txt AC 1 ms 128 KB
02-18.txt AC 1 ms 128 KB
02-19.txt AC 1 ms 128 KB
02-20.txt AC 1 ms 128 KB
02-21.txt AC 1 ms 128 KB
02-22.txt AC 2 ms 128 KB
02-23.txt AC 1 ms 128 KB
02-24.txt AC 1 ms 128 KB
02-25.txt AC 1 ms 128 KB
02-26.txt AC 1 ms 128 KB
02-27.txt AC 1 ms 128 KB
02-28.txt AC 1 ms 128 KB
02-29.txt AC 1 ms 128 KB
02-30.txt AC 1 ms 128 KB
02-31.txt AC 1 ms 128 KB
02-32.txt AC 1 ms 128 KB
02-33.txt AC 1 ms 128 KB
02-34.txt AC 1 ms 128 KB
02-35.txt AC 1 ms 128 KB
02-36.txt AC 1 ms 128 KB
02-37.txt AC 1 ms 128 KB
02-38.txt AC 1 ms 128 KB
02-39.txt AC 1 ms 128 KB
02-40.txt AC 1 ms 128 KB
sample-01.txt AC 1 ms 128 KB
sample-02.txt AC 1 ms 128 KB
sample-03.txt AC 1 ms 128 KB