【4月5日腾讯技术岗笔试第二题,求大神指点~】
import java.util.Scanner;
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("请输入歌曲长度k:");
int k = in.nextInt();
int [] a = new int [4];
System.out.println("请依次输入A,X,B,Y的值");
for(int i=0;i<4;i++){
a[i]=in.nextInt();
}
int A = a[0];
int x = a[1];
int B = a[2];
int y = a[3];
int sum = test(k,A,x,B,y);
int result = sum % 1000000007;
System.out.println(result);
}
public static int test(int k,int A,int x,int B,int y){
int count = 0;
for(int i=0;i<=x;i++){
for(int j=0;j<=y;j++){
if(i*A+j*B==k){
count = test2(x,i)*test2(y,j);
break;
}
}
}
return count;
}
public static int test2(int m,int k){
for(int i=1;i<k;i++){
m = m * (m - i);
}
return m;
}
}
#实习##笔试题目##腾讯#
public class Main {
public static void main(String[] args) {
Scanner in = new Scanner(System.in);
System.out.println("请输入歌曲长度k:");
int k = in.nextInt();
int [] a = new int [4];
System.out.println("请依次输入A,X,B,Y的值");
for(int i=0;i<4;i++){
a[i]=in.nextInt();
}
int A = a[0];
int x = a[1];
int B = a[2];
int y = a[3];
int sum = test(k,A,x,B,y);
int result = sum % 1000000007;
System.out.println(result);
}
public static int test(int k,int A,int x,int B,int y){
int count = 0;
for(int i=0;i<=x;i++){
for(int j=0;j<=y;j++){
if(i*A+j*B==k){
count = test2(x,i)*test2(y,j);
break;
}
}
}
return count;
}
public static int test2(int m,int k){
for(int i=1;i<k;i++){
m = m * (m - i);
}
return m;
}
}
#实习##笔试题目##腾讯#