import java.util.Scanner;
class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int a = sc.nextInt();
int b = sc.nextInt();
int c = sc.nextInt();
if(b >= c){ // 1대를 만드는 금액이 1대를 파는 금액보다 크면 안됨
System.out.println("-1");
}
else{
System.out.println(a / (c - b) + 1);
}
}
}
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int max = 1;
int d = 6;
int answer = 1;
for(int i = 0; i < n; i++) {
if(max >= n) {
break;
}
max += d;
d += 6; // 6의 배수씩 커짐
answer++;
}
System.out.println(answer);
sc.close();
}
}
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int a = 0;
int r = 0;
for(int i = 1; a < n; i++) {
a += i;
r += 1;
}
int d = a - n; // 차이를 계산해서 몇번째인지 계산하기 위함
if(r % 2 == 0) { // 짝수인 경우 위에서 아래로 이동
System.out.print((r - d) + "/" + (d + 1));
} else { // 홀수인 경우 아래에서 위로 이동
System.out.print((d + 1) + "/" + (r - d));
}
sc.close();
}
}
import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.StringTokenizer;
public class Main {
public static void main(String[] args) throws Exception {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
StringTokenizer st = new StringTokenizer(br.readLine());
int a = Integer.parseInt(st.nextToken());
int b = Integer.parseInt(st.nextToken());
int v = Integer.parseInt(st.nextToken());
int day = 1;
v -= a;
day += v / (a - b);
if(v % (a - b) > 0) {
day++;
}
System.out.println(day);
}
}
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int t = sc.nextInt();
for(int i = 0; i < t; i++) {
int h = sc.nextInt();
int w = sc.nextInt();
int n = sc.nextInt();
int a = (n / h) + 1;
int b = n % h;
if(n % h == 0) {
a = n / h;
b = h;
}
System.out.println(b * 100 + a);
}
sc.close();
}
}
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int t = sc.nextInt();
int k;
int n;
for(int i = 0; i < t; i++) {
k = sc.nextInt();
n = sc.nextInt();
int[] floor = new int[n];
for(int j = 0; j <= k; j++) {
for(int m = 0; m < n; m++) {
if(j == 0) {
if(m == 0) {
floor[m] = 1;
}
else {
floor[m] = m + 1;
}
}
else {
if(m > 0) {
floor[m] = floor[m] + floor[m - 1];
}
}
}
}
System.out.println(floor[n - 1]);
}
sc.close();
}
}
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner sc = new Scanner(System.in);
int n = sc.nextInt();
int a = 0;
int b = 0;
while(n % 5 != 0 && n > 0) {
n -= 3;
b++;
}
a = n / 5;
n = n % 5;
if(n < 0) {
System.out.println(-1);
}
else {
System.out.println(a + b);
}
sc.close();
}
}
import java.util.*;
import java.math.BigInteger;
public class Main {
public static void main(String[] args){
Scanner sc = new Scanner(System.in);
BigInteger a = sc.nextBigInteger();
BigInteger b = sc.nextBigInteger();
System.out.println(a.add(b));
sc.close();
}
}