create dev channel

zeta/c/completed/19592.c

@@ -0,0 +1,54 @@
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+int compare(const void *first, const void *second) {
+    if (*(int *) first < *(int *) second)
+        return 1;
+    else if (*(int *) first > *(int *) second)
+        return -1;
+    else
+        return 0;
+}
+
+int main() {
+    int T;
+    scanf("%d", &T);
+    int N, X, Y;
+    int *V;
+    for (int i = 0; i < T; i++) {
+        scanf("%d %d %d", &N, &X, &Y);
+        V = (int *) calloc(N, sizeof(int));
+        for (int j = 0; j < N; j++) {
+            scanf("%d", &V[j]);
+        }
+        int my_speed = V[N - 1];
+        qsort(V, N - 1, sizeof(int), compare);
+        int rival_speed = V[0];
+        double rival_time;
+        if (my_speed > rival_speed) {
+            printf("%d\n", 0);
+            free(V);
+            continue;
+        } else {
+            rival_time = (double) X / (double) rival_speed;
+        }
+        double Z;
+        int iZ;
+        if (rival_time >= 1) {
+            Z = X - (rival_time - 1) * my_speed;
+        } else {
+            Z = rival_speed + 1;
+        }
+
+        iZ = floor(Z + 1);
+        if (iZ > Y) {
+            printf("%d\n", -1);
+        } else {
+            printf("%d\n", iZ);
+        }
+        free(V);
+    }
+
+    return 0;
+}