对拍

30% n <= 1000

100% n <= $10^6$

写暴力

造数据

同余方程 ax = b (mod p) 
int rand() {
    int x = gao();
    return x;
}
1. 如果不指定种子，返回结果相同 
srand((unsigned)time(0)); 每秒刷新
2. [0, 32768)  
int rnd() {
    return rand() << 15 | rand();
}

拍

:loop
 rand.exe
 baoli.exe > b.out
 std.exe > c.out
 fc b.out c.out
 if not errorlevel 1 goto loop
pause