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26 lines
432 B
C++
26 lines
432 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int t;
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long long n, p, f, ans;
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int main() {
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scanf("%d", &t);
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while (t--) {
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ans = 0;
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f = 1;
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scanf("%lld%lld", &n, &p);
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if (p == 1) {
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printf("0\n");
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continue;
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}
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for (long long k = n; k; k /= p) {
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ans += f * k;
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f = -f;
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}
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printf("%lld\n", ans);
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}
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return 0;
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}
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