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2 years ago
#include <bits/stdc++.h>
using namespace std;
int main() {
int n, c, count = 0; //a:10的个数b:20的个数c:50的个数
cin >> n; //n元钞票
for (c = 0; c <= 2 * n / 100; c++)
//count += 5 * (n - c * 50) / 100 + 1;
count += (n - c * 50) / 20 + 1;
cout << count << endl;
return 0;
}