27 lines
371 B
C
27 lines
371 B
C
#include <stdio.h>
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#include <string.h>
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int pow_(int x, int y) {
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if (!y) {
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return 1;
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}
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int res = x;
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for (int i = 1; i <= y-1; ++i) {
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res = res*x;
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}
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return res;
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}
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int main() {
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char nya[10000];
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int res = 0;
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scanf("%s", nya);
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int len = strlen(nya);
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for (int i = len-1; i >= 0; --i) {
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res += (nya[i] - '0') * pow_(3, len-i-1);
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}
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printf("%d\n", res);
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}
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