문제
풀이
#include <iostream>
#include <string>
using namespace std;
void solve(void) {
int n, m;
cin >> n >> m;
int ans = 0;
for (int i=n; i<=m; i++) {
string s = to_string(i);
for (auto j=0; j<s.length(); j++) {
if (s[j] == '0') ans++;
}
}
cout << ans << "\n";
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin >> t;
while (t--) {
solve();
}
return 0;
}