#include <stdio.h>
#include <stdlib.h>
 
int main(){
    int n, i;
    int *a;
 
    scanf("%d",&n); //inputに4をいれている
 
    a = (int *)malloc(sizeof(int)*n);
 
    //領域の確保を失敗した場合、正しく確保できたら先頭アドレスを返す
    if(a == NULL){
        printf("ERROR\n");
        return 0; 
    }
 
    //確保した領域にi+1を代入
    for(i=0;i<n;i++){
        a[i] = i + 1;
    }
 
    //確保した領域を表示
    for(i=0;i<n;i++){
        printf("%d ",a[i]);
    }
 
    printf("\n");
 
    free(a); //最後に領域をfreeする
 
    return 0;
}
 

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NA==

4