摘要：#include using namespace std; #define rep(i,a,n) for (int i=a;i=a;i--) #define pb push_back #define mp make_pair #define all(x) (x).begin(),(x).end() #define fi first #define se second #define SZ(x)... 阅读全文

摘要：链接：https://www.nowcoder.com/acm/contest/147/A来源：牛客网 Niuniu has recently learned how to use Gaussian elimination to solve systems of linear equations. 阅读全文