reorganize dir

Signed-off-by: Mia Steinkirch <mia.steinkirch@gmail.com>

other_resources/Project-Euler/015-lattice_paths.py

@@ -0,0 +1,42 @@
+#!/usr/bin/python3
+# mari von steinkirch @2013
+# steinkirch at gmail
+
+def lattice_paths(squares):
+    gridsize = squares+1
+    grid = [[0 for i in range(gridsize)] for j in range(gridsize)]
+    row, col = 0, 0
+    
+    while col < gridsize:     
+        while row < gridsize: 
+        
+            if row == 0 and col == 0:
+                grid[row][col] = 1
+            
+            else:
+                if row == 0 and col != 0:
+                    grid[row][col] += grid[row][col-1]
+                elif row != 0 and col == 0:
+                    grid[row][col] += grid[row-1][col]  
+                else:
+                    grid[row][col] += grid[row][col-1] + grid[row-1][col] 
+            
+            row += 1 
+        row = 0
+        col += 1       
+    return grid[gridsize-1][gridsize-1]
+
+    
+def main():
+    import time
+    start = time.time() 
+    
+    assert(lattice_paths(2) == 6)
+    print(lattice_paths(20))
+    
+    elapsed = (time.time() - start)
+    print('Tests Passed!\n It took %s seconds to run them.' % (elapsed))   
+                   
+if __name__ == '__main__':
+    main()
+