Submission #122754


Source Code Expand

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


void quicksort(int array[], int left, int right) {
    int l = left;
    int r = right;
    int pivot = array[(left + right) / 2]; 
    int buf;

    while (1) {
        while (array[l] < pivot) l++;
        while (array[r] > pivot) r--;

        if (l > r) break;

        buf = array[l];
        array[l] = array[r];
        array[r] = buf;

        l++, r--;
    };

    if (left < r)  quicksort(array, left, r);
    if (l < right) quicksort(array, l, right);
}

int main(){
	int N,K;
	int* R;
	int count;
	int i;
	double ave = 0;
	scanf("%d %d",&N,&K);
	R = (int*)malloc(sizeof(int) * N);
	for(i=0;i<N;i++){
		scanf("%d",&R[i]);
	}
	quicksort(R,0,N-1);
	
	for(i=N-K;i<N;i++){
		ave = (ave + R[i])/2;
	}
	
	printf("%lf\n",ave);
	free(R);
	return 0;
}

Submission Info

Submission Time
Task C - AtCoderプログラミング講座
User takapiko
Language C (GCC 4.6.4)
Score 100
Code Size 839 Byte
Status
Exec Time 22 ms
Memory 808 KB

Compile Error

./Main.c: In function ‘main’:
./Main.c:34:7: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]
./Main.c:37:8: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result

Set Name Score / Max Score Test Cases
All 100 / 100 00_sample_01.txt, 00_sample_02.txt, 00_sample_03.txt, 00_sample_04.txt, test_01.txt, test_02.txt, test_03.txt, test_04.txt, test_05.txt, test_06.txt, test_07.txt, test_08.txt, test_09.txt, test_10.txt, test_11.txt, test_12.txt, test_13.txt, test_14.txt, test_15.txt, test_16.txt, test_17.txt, test_18.txt, test_19.txt, test_20.txt, test_21.txt, test_22.txt, test_23.txt, test_24.txt, test_25.txt, test_26.txt, test_27.txt, test_28.txt, test_29.txt, test_30.txt
Case Name Status Exec Time Memory
00_sample_01.txt 20 ms 656 KB
00_sample_02.txt 19 ms 700 KB
00_sample_03.txt 20 ms 720 KB
00_sample_04.txt 18 ms 700 KB
test_01.txt 19 ms 708 KB
test_02.txt 19 ms 700 KB
test_03.txt 19 ms 696 KB
test_04.txt 20 ms 808 KB
test_05.txt 20 ms 708 KB
test_06.txt 20 ms 712 KB
test_07.txt 20 ms 704 KB
test_08.txt 20 ms 708 KB
test_09.txt 18 ms 704 KB
test_10.txt 21 ms 800 KB
test_11.txt 19 ms 672 KB
test_12.txt 19 ms 708 KB
test_13.txt 18 ms 800 KB
test_14.txt 18 ms 804 KB
test_15.txt 20 ms 712 KB
test_16.txt 20 ms 700 KB
test_17.txt 19 ms 696 KB
test_18.txt 19 ms 700 KB
test_19.txt 21 ms 716 KB
test_20.txt 20 ms 708 KB
test_21.txt 21 ms 808 KB
test_22.txt 19 ms 676 KB
test_23.txt 20 ms 700 KB
test_24.txt 20 ms 800 KB
test_25.txt 20 ms 708 KB
test_26.txt 20 ms 708 KB
test_27.txt 19 ms 704 KB
test_28.txt 21 ms 696 KB
test_29.txt 22 ms 704 KB
test_30.txt 22 ms 800 KB