Pascal's triangle: Difference between revisions
Content added Content deleted
(→Summing from Previous Rows: initial "last" is never used) |
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if(rows < 0) return; |
if(rows < 0) return; |
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//save the last row here |
//save the last row here |
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LinkedList<Integer> last = |
LinkedList<Integer> last = new LinkedList<Integer>(); |
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for(int i= 0;i <= rows;++i){ |
for(int i= 0;i <= rows;++i){ |
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//work on the next row |
//work on the next row |
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LinkedList<Integer> thisRow= new LinkedList<Integer>(); |
LinkedList<Integer> thisRow= new LinkedList<Integer>(); |
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for(int j= 0;j < i;++j){//loop the number of elements in this row |
for(int j= 0;j <= i;++j){//loop the number of elements in this row |
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if(j == last.size() || j == 0){//if we're on the ends |
if(j == last.size() || j == 0){//if we're on the ends |
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thisRow.add(1); |
thisRow.add(1); |
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} |
} |
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} |
} |
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thisRow.add(1); |
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last= thisRow;//save this row |
last= thisRow;//save this row |
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System.out.println(thisRow); |
System.out.println(thisRow); |
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