include<stdio.h> int main() {
    int N, i, arr[N];
    printf("请输入筷子的数量N(2<=N<=100):\n");
    scanf("%d", &N);
    printf("请输入N个筷子的长度(1~100):\n");
    for (i = 0; i < N; i++) scanf("%d", &arr[i]);
    for (i = 1; i < N; i++) {
        if (arr[0] != arr[i]) {
            printf("NO");
            break;
        } else
            printf("Yes")
    }
    return 0;
}

/sandbox/1/a.cpp:1:1: error: 'include' does not name a type
    1 | include<stdio.h>
      | ^~~~~~~