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    long dp[],array[];
    long rec(int i,int prv){                // 0-> len turn, 1--
        if ( i >= array.length )
            return 0;
 
        if ( dp[i] != -1 )
            return dp[i];
 
        if ( i == array.length - 3 ) {
            dp[i] = array[i] + array[i+1] + array[i+2];
        }
        else if ( i == array.length - 2 ) {
            dp[i] = array[i] + array[i+1];
        }
        else if ( i == array.length - 1 ) {
            dp[i] = array[i];
        }
        else {
            dp[i] =max( max(
                    rec(i+2 , array.length) + array[i] ,
                    rec(i+4 , array.length) + array[i] + array[i+1]),
                    rec(i+6 , array.length) + array[i] + array[i+1] + array[i+2] );
        } return dp[i];
 
    }
 

Main.java:1: error: class, interface, or enum expected
    long dp[],array[];
    ^
Main.java:2: error: class, interface, or enum expected
    long rec(int i,int prv){                // 0-> len turn, 1--
    ^
Main.java:6: error: class, interface, or enum expected
        if ( dp[i] != -1 )
        ^
Main.java:9: error: class, interface, or enum expected
        if ( i == array.length - 3 ) {
        ^
Main.java:11: error: class, interface, or enum expected
        }
        ^
Main.java:14: error: class, interface, or enum expected
        }
        ^
Main.java:17: error: class, interface, or enum expected
        }
        ^
Main.java:23: error: class, interface, or enum expected
        } return dp[i];
        ^
Main.java:25: error: class, interface, or enum expected
    }
    ^
9 errors

Standard output is empty