emmm...
图片出了点问题，我想问问怎么上传一张图片到洛谷？
by gongchuqiao @ 2022-08-14 14:09:40
2015年NOIP普及组27题答案错误
错误答案： (offset + dayNum[i]) % 7 / dayNum[m]
正确答案： (offset + dayNum[i]) % 7
by Distinct @ 2022-08-14 19:51:08
CSP 2020 提高组 17题的第一小问，$[L+1,R]$打成了$[L+l,R]$
by d909RCA @ 2022-08-16 13:00:42
@[donyking](/user/577384) 好像就是SCP...
by d909RCA @ 2022-08-16 13:04:05
@[chen_zhe](/user/8457) 2019年的入门组第18题能否给数学公式加 $ \LaTeX$？看起来很乱。
by lilong @ 2022-08-16 15:54:22
CSP 2020 提高组 18题的第五小问，`0123456789ab\nba9876543210\nl ` 最后一个 $1$ 打成了 $l$
by CloudWings @ 2022-08-16 17:19:08
@[chen_zhe](/user/8457)
NOIP 2007 提高组初赛试题第 24 题答案有误
正确答案：
```
No.1: 3,6 No.2: 3,6
```
给的答案是：
```
No.1:3,6 No.2:3,6
```
程序中是有空格的：
```cpp
#include <stdio.h>
void fun( int *a, int *b )
{
int *k;
k = a; a = b; b = k;
}
main()
{
int a = 3, b = 6, *x = &a, *y = &b;
fun( x, y );
printf( "No.1: %d,%d ", a, b );
fun( &a, &b );
printf( "No.2: %d,%d\n", a, b );
}
```
25题也有问题。
```cpp
#include "math.h"
#include "stdio.h"
main()
{
int a1[51] = { 0 };
int i, j, t, t2, n = 50;
for ( i = 2; i <= sqrt( n ); i++ )
if ( a1[i] == 0 )
{
t2 = n / i;
for ( j = 2; j <= t2; j++ )
a1[i * j] = 1;
}
t = 0;
for ( i = 2; i <= n; i++ )
if ( a1[i] == 0 )
{
printf( "%4d", i ); t++;
if ( t % 10 == 0 )
printf( "\n" );
}
printf( "\n" );
}
```
这个程序应该在输出十个质数后换行，答案却不然。
by _zhy @ 2022-08-16 19:53:05
CSP 2020 提高组 19题题面，$a(0<a<l)$， 最后一个 $1$ 打成了 $l$
by CloudWings @ 2022-08-16 20:35:06
@[chen_zhe](/user/8457) NOIP 2011 普及组初赛试题T4《单块集成电驴》，应改为单块集成电路
by gongziwen @ 2022-08-16 21:03:01
@[sunmoran](/user/775793) %%%
by xs_siqi @ 2022-08-17 14:18:25