refactor(structure): normalize folder names with leading zeros for consistency

- Renamed all folders from format NEx (e.g., 1Ex, 2Ex...) to 0NEx (01Ex, 02Ex, etc.)
- Updated subdirectories and files accordingly
- Removed old main Makefile and tasks (a01.c–a09.c, solve.c, io_status.h), likely obsolete
- Cleaned up deprecated task binaries and configs

2025.03.07/01Ex/main.c

@@ -0,0 +1,64 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include "array_io.h"
+#include "io_status.h"
+#include "solve.h"
+
+/* ./a.out n p k [filename] */
+int main(int argc, char *argv[])
+{
+	double t, *a;
+	int n, p, k, res, task = 1;
+	char *name = 0;
+	
+	if (!((argc == 4 || argc == 5) && 
+				sscanf(argv[1], "%d", &n) == 1 && 
+				sscanf(argv[2], "%d", &p) == 1 &&
+				sscanf(argv[3], "%d", &k) == 1 &&
+				k >= 0 && k <= 4 && (!(k == 0 && argc != 5))))
+	{
+		printf("Usage: %s n p k [filename]\n", argv[0]);
+		return 1;
+	}
+	if (argc == 5) name = argv[4];
+
+	a = (double *)malloc(n * n * sizeof(double));
+	if (!a)
+	{
+		printf("Not enough memory\n");
+		return 2;
+	}
+
+	if (name)
+	{ /* из файла */
+		io_status ret;
+		ret = read_sq_matrix(a, n, name);
+		do {
+			switch (ret)
+			{
+				case SUCCESS:
+					continue;
+				case ERROR_OPEN:
+					printf("Cannot open %s\n", name);
+					break;
+				case ERROR_READ:
+					printf("Cannot read %s\n", name);
+			}
+			free(a);
+			return 3;
+		} while (0);
+	} else init_sq_matrix(a, n, k);
+
+	printf("Initial matrix:\n");
+	print_sq_matrix(a, n, p);
+
+	t =  clock();
+	res = t1_solve(a, n);
+	t = (clock() - t) / CLOCKS_PER_SEC;
+
+	printf("Result = %d\n", res);
+	printf("%s : Task = %d Elapsed = %.2f\n", argv[0], task, t);
+	free(a);
+	return 0;
+}