这个代码是以前代码改来的，有些地方可能会变量名不对应或者变量没用
by 崛起的滑稽 @ 2022-12-31 11:55:34
@[崛起的滑稽](/user/511811) 不是这样的吗
```cpp
bool G_J() {
for (int i = 1; i <= n; ++i) {
int tmp = i;
for (int k = i + 1; k <= n; ++k) {
if (A.c[k][i] > A.c[tmp][i]) { // <---
tmp = k;
// break;
}
}
if (tmp != i) { // <---
swap(A.c[tmp], A.c[i]);
}
if (A.c[i][i] == 0) {
return false;
}
int x = qpow(A.c[i][i], MOD - 2);
for (int k = 1; k <= n; ++k) {
if (k == i) {
continue;
}
int t = A.c[k][i] * x % MOD;
for (int j = i; j <= 2 * n; ++j) {
A.c[k][j] = ((A.c[k][j] - t * A.c[i][j]) % MOD + MOD) % MOD;
}
}
for (int k = 1; k <= n * 2; ++k) {
A.c[i][k] = (A.c[i][k] * x) % MOD;
}
}
return 1;
}
```
by Ruiqun2009 @ 2022-12-31 12:13:22
实测[能通过](https://www.luogu.com.cn/record/98324643)。
by Ruiqun2009 @ 2022-12-31 12:14:01
@[Ruiqun2009](/user/589895) 感谢大佬，找到bug了
by 崛起的滑稽 @ 2022-12-31 12:16:14