create dev channel

zeta/c/completed/24368.c

@@ -0,0 +1,40 @@
+#include <stdio.h>
+
+int check(a2, a1, a0, c, n0) {
+    if (c - a2 < 0) {
+        return 0;
+    } else if (c - a2 == 0) {
+        if (a1 == 0) {
+            if (-a0 >= 0) {
+                return 1;
+            }
+        } else if (-a1 > 0) {
+            if ((-a1) * n0 - a0 >= 0) {
+                return 1;
+            }
+        }
+        return 0;
+    } else {
+        int p = (c - a2) * n0 * n0 - a1 * n0 - a0;
+        if (p >= 0) {
+            int d = a1 * a1 + 4 * (c - a2) * a0;
+            if (d <= 0) {
+                return 1;
+            } else {
+                double axis = (double) (a1) / (2.0 * (double) (c - a2));
+                if (n0 >= axis) {
+                    return 1;
+                }
+            }
+        }
+        return 0;
+    }
+}
+
+int main() {
+    int a2, a1, a0, c, n0;
+    scanf("%d %d %d", &a2, &a1, &a0);
+    scanf("%d", &c);
+    scanf("%d", &n0);
+    printf("%d\n", check(a2, a1, a0, c, n0));
+}