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OI-codes/Luogu/problem/P1590/P1590.cpp
2021-01-02 15:30:52 +08:00

32 lines
504 B
C++

// 70' Code (R38866815)
#include <bits/stdc++.h>
using namespace std;
bool find(int s, int x) {
while (s) {
if (s % 10 == x) {
return true;
}
s /= 10;
}
return false;
}
int main() {
int t, n, ans;
cin >> t;
for (int i = 0; i < t; i++) {
cin >> n;
ans = 0;
for (int i = 1; i <= n; i++) {
if (!find(i, 7)) {
ans++;
}
}
cout << ans << endl;
}
return 0;
}