2 files changed, 58 insertions, 0 deletions
diff --git a/codeforces/697a.c b/codeforces/697a.c
new file mode 100644
index 0000000..576bc59
--- /dev/null
+++ b/codeforces/697a.c
@@ -0,0 +1,17 @@
+#include <stdio.h>
+
+int main()
+{
+	long t, s, x;
+
+	scanf("%ld %ld %ld", &t, &s, &x);
+
+	x -= t;
+
+	if (((x % s == 1) && (x / s > 0)) || ((x % s == 0) && (x / s >= 0)))
+		puts("YES");
+	else
+		puts("NO");
+
+	return 0;
+}
diff --git a/codeforces/697b.c b/codeforces/697b.c
new file mode 100644
index 0000000..a41cf7f
--- /dev/null
+++ b/codeforces/697b.c
@@ -0,0 +1,41 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+
+int main()
+{
+	char a, d[100], b, i, bgun = 0;
+
+	scanf("%hhd.%s", &a, d);
+	for (i = 0; i < strlen(d); i++)
+		if (d[i] == 101) {
+			b = atoi(d + i + 1);
+			d[i] = 0;
+		}
+
+	if (a) {
+		printf("%hhd", a);
+		bgun = 1;
+	}
+
+	for (i = 0; i < b; i++) {
+		a = (i < strlen(d)) ? d[i] : 48;
+		if (bgun || a ^ 48) {
+			putchar(a);
+			bgun = 1;
+		}
+	}
+	
+	if (!bgun)
+		putchar(48);
+
+	if (i < strlen(d) && (d[i] ^ 48 || strlen(d) ^ 1)) {
+		putchar(46);
+		for (; i < strlen(d); i++)
+			putchar(d[i]);
+	}
+
+	putchar(10);
+
+	return 0;
+}