Submission #73145449

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Source Code Expand

#include<bits/stdc++.h>
using namespace std;

#define ll long long
#define all(v) v.begin(), v.end()
#define memo(v, x) memset(v, x, sizeof(v))
#define sz(v) (int)v.size()

void solve() {
    int n, k;
    cin >> n >> k;
    int ans = 0;
    for (int i = 0; i <= n; i++) {
        string s = to_string(i);
        int sum = 0;
        for (auto &c : s) {
            sum += (c - '0');
        }
        ans += (sum == k);
    }
    cout << ans;
}

int32_t main() {
    cin.tie(0) -> sync_with_stdio(0);
#ifndef ONLINE_JUDGE
    freopen("input.txt", "r", stdin);
    freopen("output.txt", "w", stdout);
#endif
    int tc = 1;
    // cin >> tc;
    for (int t = 1; t <= tc; t++) {
        solve();
    }
    return 0;
}

Submission Info

Judge Result