- class Logaritmos { 
-   
-     public static void-  main (String[]-  args ) {
 
-         System- . out- . println(- log (2- ,  128));
 
-         System- . out- . println(- log (5- ,  625));
 
-         System- . out- . println(- log (100- ,  1000));
 
-         System- . out- . println(- log (7- ,  49));
 
-     } 
-   
-     public static double log(double base, double valor) { 
-         return Math- . log(- valor ) / Math- . log(- base );
 
-     } 
- } 
				Y2xhc3MgTG9nYXJpdG1vcyB7CgogICAgcHVibGljIHN0YXRpYyB2b2lkIG1haW4oU3RyaW5nW10gYXJncykgewogICAgICAgIFN5c3RlbS5vdXQucHJpbnRsbihsb2coMiwgMTI4KSk7CiAgICAgICAgU3lzdGVtLm91dC5wcmludGxuKGxvZyg1LCA2MjUpKTsKICAgICAgICBTeXN0ZW0ub3V0LnByaW50bG4obG9nKDEwMCwgMTAwMCkpOwogICAgICAgIFN5c3RlbS5vdXQucHJpbnRsbihsb2coNywgNDkpKTsKICAgIH0KCiAgICBwdWJsaWMgc3RhdGljIGRvdWJsZSBsb2coZG91YmxlIGJhc2UsIGRvdWJsZSB2YWxvcikgewogICAgICAgIHJldHVybiBNYXRoLmxvZyh2YWxvcikgLyBNYXRoLmxvZyhiYXNlKTsKICAgIH0KfQ==