From 4022e5c95210631e4aceb08eaf9d9071aa5aefc4 Mon Sep 17 00:00:00 2001
From: Richard Qin <richard.qin.001@gmail.com>
Date: Tue, 15 Sep 2026 08:16:43 +0800
Subject: Set up a git repo

---
 tests/upload/matrix_det_2.sy | 128 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 128 insertions(+)
 create mode 100644 tests/upload/matrix_det_2.sy

(limited to 'tests/upload/matrix_det_2.sy')

diff --git a/tests/upload/matrix_det_2.sy b/tests/upload/matrix_det_2.sy
new file mode 100644
index 0000000..070d479
--- /dev/null
+++ b/tests/upload/matrix_det_2.sy
@@ -0,0 +1,128 @@
+const int N = 205;
+
+// gets matrix values from user
+void get_matrix (int M[][N],int m, int n)
+{
+	int i;
+	int j;
+	i=0;
+	while (i<m)
+	{
+		j=0;
+		while (j<n) {
+			M[i][j] = getint();
+			j=j+1;
+		}
+		i=i+1;
+	}
+}
+ 
+// prints matrix of mXn
+void print_matrix (int M[][N],int m, int n)
+{
+	int i;
+	int j;
+	int temp;
+	i=0;
+	while (i<m) //go over columns
+	{
+		j=0;
+		while (j<n)  //go over rows
+		{
+			putint(M[i][j]);
+			putch(32);
+			j=j+1;
+		}
+		putch(10);
+		i=i+1;
+	}
+}
+
+
+int powfff(int n, int times) {
+	int i;
+	int res;
+	
+	if (times == 0) {
+		return 1;
+	}
+	i=0;
+	res = n;
+	while(i<times-1){
+		res = res*n;
+		i=i+1;
+	}	
+	return res;
+}
+
+void GetSubmatrix(int M[][N],int submatrix[][N],int n,int neglect_line)
+{
+    int i;
+	int j;
+	int k;
+	
+	i=0;
+    while(i<n-1)
+    {
+    	j=0;
+    	k=0;
+        while(j<n-1)
+        {
+            if(k!=neglect_line)
+            {
+                submatrix[i][j]=M[i+1][k];
+                j=j+1;
+            }
+            k=k+1;
+        }
+        i=i+1;
+    }
+}
+
+
+int CalculateMatrix(int M[][N],int submatrix[][N],int m, int n)
+{
+    int i;
+    int sum;
+    int submatrix_value;
+    sum = 0;
+    if(n==2)
+    {
+        return M[0][0]*M[1][1]-M[1][0]*M[0][1];
+    }
+    else
+    {
+    	i = 0;
+        while(i<n)
+        {
+            GetSubmatrix(M,submatrix,n,i);
+            submatrix_value=CalculateMatrix(submatrix,submatrix, n-1, n-1);
+            sum=sum + powfff(-1,i) * M[0][i] * submatrix_value;
+            i=i+1;
+        }
+        return sum;
+    }
+
+}
+
+int main()
+{
+	int n;
+	int m;
+	int result;
+	
+	int M[N][N];
+	int submatrix[N][N];
+	
+	m=getint();
+	n=getint();
+
+    get_matrix (M,m,n); //get matrix from user
+    
+    print_matrix(M,m,n); //print matrix
+    
+    result = CalculateMatrix(M, submatrix, m,n);
+    
+    putint(result);
+    return 0;
+}
\ No newline at end of file
-- 
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