Parvej's blog

What's the reason behind the Runtime Error?
By Parvej, history, 18 months ago, In English

I got a runtime error on the last Atcoder Regular Contest.

The problem is this .

My RE solution here .

Runtime Error Part
RE test case

I always wrote (char) ('a'+k)to get the kth letter from the alphabet and didn't get Runtime Error on any platform.

Why am I getting RE this time?

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18 months ago, # |
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RTE here:

if (xx >= 0 && xx < n && yy >= 0 && yy < m) {
	int d = ch[xx][yy] - '0';
	f[d] = 1;
}

when ch[xx][yy] = '.', d = -2. On my machine it somehow modify the value of m and cause RTE:|

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    18 months ago, # ^ |
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    Ah! Thank you very much.

    Didn't notice that.

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