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P1590 失踪的7

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R58057674
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Baoshuo Ren 2021-09-15 18:22:51 +08:00 committed by Baoshuo Ren
parent 5e8c50f621
commit 86539a48c3
Signed by: baoshuo
GPG Key ID: 70F90A673FB1AB68
1 changed files with 6 additions and 18 deletions
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24
Luogu/problem/P1590/P1590.cpp
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@ -1,29 +1,17 @@
// 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;
}
long long t, n, m, ans;
int main() {
int t, n, ans;
cin >> t;
for (int i = 0; i < t; i++) {
while (t--) {
ans = m = 0;
cin >> n;
ans = 0;
for (int i = 1; i <= n; i++) {
if (!find(i, 7)) {
ans++;
}
while (n) {
ans += (n % 10 - (n % 10 > 7)) * pow(9, m++);
n /= 10;
}
cout << ans << endl;
}