forked from github/server
24 lines
546 B
C
24 lines
546 B
C
#include <stdlib.h>
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#include <string.h>
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#include <stdio.h>
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int main(int argc, char **argv)
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{
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char key[4];
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char code[4];
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char result[4];
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int a, i, rot;
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for (a = 1; a < argc; ++a) {
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const char *str = argv[a];
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size_t len = strlen(str);
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str = str + len - 6;
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memcpy(key, str, 3);
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memcpy(code, str + 3, 3);
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result[3] = key[3] = code[3] = 0;
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rot = atoi(key);
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for (i = 0; i != 3; ++i)
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result[(i + rot) % 3] = ((code[i] + 10 - key[i]) % 10) + '0';
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printf("%s %s\n", argv[a], result);
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}
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return 0;
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}
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