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ChickenInKitchen's blog

Need Help
By ChickenInKitchen, history, 7 years ago, In English

why my submission gives wrong output here while it works fine on my computer ? 31150639

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7 years ago, # |
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I don't know the answer for that but you can try to debug using the Custom Test in CF. If it still doesn't help you maybe you should explain your solution.

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    7 years ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    well its weird . for this problem we should output 3 numbers . then last 2 are fine the first is correct in my computer for both samples but in CF its a nonsense number

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7 years ago, # |
← Rev. 3   Vote: I like it +7 Vote: I do not like it

In the loop 

for(int j = 1 ; j <= n ; j ++ ){
    sdp[i][j] = (sdp[i - 1][j] + dp[i][j]) % mod;
}

When i = 0, you are accessing sdp[i - 1][j] which is undefined behaviour, which explains the fact that your submission gives some garbage value

Hope this helps!

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7 years ago, # |
  Vote: I like it -8 Vote: I do not like it

read this : http://codeforces.net/blog/entry/55902

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