源代码：

#include <iostream>
#define MAXN 100005
using namespace std;

int n, n1[MAXN], n2[MAXN], dp[MAXN][MAXN];

int main()
{
    cin >> n;
    for (int i = 1; i <= n; i++)
        cin >> n1[i];
    for (int i = 1; i <= n; i++)
        cin >> n2[i];
    for (int i1 = 1; i1 <= n; i1++)
    {
        for (int i2 = 1; i2 <= n; i2++)
        {
            if (n1[i1] == n2[i2])
            {
                dp[i1][i2] = dp[i1 - 1][i2 - 1] + 1;
            }
            else
            {
                dp[i1][i2] = max(dp[i1 - 1][i2], dp[i1][i2 - 1]);
            }
        }
    }

    cout << dp[n][n];

    return 0;
}

在本地运行成功（VSCode + GCC 13.2.0）

PS C:\Users\JN\Desktop\learn-algorithm>  & 'c:\Users\JN\.vscode\extensions\ms-vscode.cpptools-1.23.5-win32-x64\debugAdapters\bin\WindowsDebugLauncher.exe' '--stdin=Microsoft-MIEngine-In-nvb0fvmh.c0o' '--stdout=Microsoft-MIEngine-Out-ftd20mee.gbf' '--stderr=Microsoft-MIEngine-Error-5yjc5gm2.wss' '--pid=Microsoft-MIEngine-Pid-gqa53hod.w32' '--dbgExe=C:\Program Files\Scoop\shims\gdb.exe' '--interpreter=mi' 
5 
3 2 1 4 5
1 2 3 4 5
3
PS C:\Users\JN\Desktop\learn-algorithm> //这里在等待输入

洛谷编译信息：

No valid executable file was produced by the compiler
./cc4I7Oqs.o: in function `_GLOBAL__sub_I_src':
src:(.text.startup+0x197): relocation truncated to fit: R_X86_64_PC32 against `.bss'
src:(.text.startup+0x1b1): relocation truncated to fit: R_X86_64_PC32 against `.bss'
collect2: 错误：ld 返回 1