39 lines
657 B
C
39 lines
657 B
C
#include <stdio.h>
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#include <stdlib.h>
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char *convertToTitle(int columnNumber)
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{
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char *ret = malloc(2);
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int size = 1;
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while (columnNumber > 0)
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{
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columnNumber--;
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const int mod = columnNumber % 26;
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columnNumber /= 26;
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ret[size - 1] = 'A' + mod;
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size++;
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ret = realloc(ret, size + 1);
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}
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ret[size - 1] = '\0';
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for (int i = 0, j = size - 2; i < j; i++, j--)
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{
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const char tmp = ret[i];
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ret[i] = ret[j];
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ret[j] = tmp;
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}
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return ret;
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}
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int main()
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{
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char *ans = convertToTitle(2147483647);
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printf("%s\n", ans);
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free(ans);
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return 0;
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}
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