CODE FESTIVAL 2016 qual A

Submission #1260676

Source codeソースコード

#include<stdio.h>
#include<stdlib.h>

int main(void)
{
	int n,i,j,count=0;

	scanf("%d", &n);

	int *a = (int*)malloc(n * sizeof(int));

	for (i = 0; i < n; i++) {
		scanf("%d", &a[i]);
	}

	for (i = 0; i < n ; i++) {
		if (a[a[i] - 1] == i + 1)count++;
	}
	printf("%d\n", count/2);
	free(a);
	return 0;
	
}

Submission

Task問題 B - 仲良しうさぎ / Friendly Rabbits
User nameユーザ名 kns330
Created time投稿日時
Language言語 C (GCC 5.4.1)
Status状態 AC
Score得点 200
Source lengthソースコード長 329 Byte
File nameファイル名
Exec time実行時間 11 ms
Memory usageメモリ使用量 512 KB

Compiler messageコンパイルメッセージ

./Main.c: In function ‘main’:
./Main.c:8:2: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
^
./Main.c:13:3: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &a[i]);
^

Test case

Set

Set name Score得点 / Max score Cases
Sample - 0_00.txt,0_01.txt,0_02.txt
All 200 / 200 0_00.txt,0_01.txt,0_02.txt,1_00.txt,1_01.txt,1_02.txt,1_03.txt,1_04.txt,1_05.txt,1_06.txt,1_07.txt,1_08.txt,1_09.txt,1_10.txt,1_11.txt

Test case

Case name Status状態 Exec time実行時間 Memory usageメモリ使用量
0_00.txt AC 1 ms 128 KB
0_01.txt AC 1 ms 128 KB
0_02.txt AC 1 ms 128 KB
1_00.txt AC 1 ms 128 KB
1_01.txt AC 11 ms 512 KB
1_02.txt AC 11 ms 512 KB
1_03.txt AC 11 ms 512 KB
1_04.txt AC 11 ms 512 KB
1_05.txt AC 11 ms 512 KB
1_06.txt AC 11 ms 512 KB
1_07.txt AC 11 ms 512 KB
1_08.txt AC 4 ms 256 KB
1_09.txt AC 9 ms 512 KB
1_10.txt AC 8 ms 384 KB
1_11.txt AC 2 ms 256 KB