i don't know if its allowed to discuss this here so soon..
but the competition is over and the solutions are already put up so i
take the liberty to discuss it..
- Start -
.......
.......
.......
...R...
...RB.. <=
..BRB..
.RBBR..
- Gravity -
.......
.......
.......
R......
BB..... <=
BRR....
RBBR...
the analysis says..
just push everything to the right..with the following code..
for (int row = 1; row < n; ++row) {
int x = n-1;
for (int col = n-1; col >= 0; col--)
if (piece[row][col] != '.') {
piece[row][x] = piece[row][col]; x--;
}
while(x>=0) {piece[row][x]='.'; x--;}
}
well thats what i thought of initially..but then how did the letters
change in the marked columns! i mean how did RB become BB while BRB
become BRR!
some 2010 people have solved it! so i guess im missing
something..would like to know what..
thanks in advance..
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