Topcoder srm 637 div2 500 problem

How I approach this problem is finding shortest path

and total path minus # path count minus short path minus will be a answer

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package srm637; public class PathGameDiv2 { public static void main(String args[]){ PathGameDiv2 pg = new PathGameDiv2(); String[] board = {"....#.##.....#..........." ,"..#......#.......#..#...."}; System.out.println(pg.calc(board)); } public int calc(String[] board){ int len = board[0].length(); int total =0; int p =0; total = Math.min(pathSum(p, len, board), pathSum(p+1, len, board)); int minus =0; for(int i=0; i<board.length; i++){ for(int j=0; j<board[i].length(); j++){ if(board[i].charAt(j) == '#'){ minus ++; } } } return (board[0].length()* 2) - total - minus; } public int pathSum(int p, int len, String[] board){ int total =0; for(int i=0; i<len; i++){ if(board[p].charAt(i) =='.'){ total ++; }else{ if(p==0){ p=1; i= i-2; }else{ p=0; i = i-2; } } } return total; } }