solve 2581

problems/2581/21900398.c

@@ -0,0 +1,50 @@
+#include<stdio.h>
+#include<string.h>
+int main()
+{
+	char arr[100] = { 0 };
+	int t = 0;
+	int m, n;
+	scanf("%d\n%d", &m, &n);
+	int i;
+	int a;
+	int flag = 0;
+	for (i = m; i <= n; i++)
+	{
+		for (a = 2; a < i; a++)
+		{
+			if (i%a == 0)
+			{
+				flag = 0;
+				break;
+			}
+			else
+			{
+				flag = 1;
+
+			}
+		}
+		if (flag == 1)
+		{
+			arr[t] = i;
+			t++;
+		}
+	}
+	int len = strlen(arr);
+	if (len == 0)
+	{
+		printf("-1");
+		return 0;
+	}
+	int sum = 0;
+	int x;
+
+	for (x = 0; x < len; x++)
+	{
+		sum += arr[x];
+	}
+
+	printf("%d %d", sum, arr[0]);
+	return 0;
+
+}