Loading... ```cpp #include <bits/stdc++.h> using namespace std; int main() { int k, n; cin >> n >> k; vector<int> nums; while (n) nums.push_back(n % 10), n /= 10; reverse(nums.begin(), nums.end()); int res = 0; for (int i = 0; i < nums.size(); i++) { int x = nums[i]; int a = 0, b = 0, c = 1; for (int j = 0; j < i; j++) a = a * 10 + nums[j]; for (int j = i + 1; j < nums.size(); j++) { b = b * 10 + nums[j]; c *= 10; } if (k) if (x < k) res += a * c; else if (x == k) res += a * c + b + 1; else res += (a + 1) * c; else { if (x) res += a * c; else res += (a - 1) * c + b + 1; } } cout << res << endl; return 0; } ``` Last modification：August 2, 2023 © Allow specification reprint Like 0 如果觉得我的文章对你有用，请随意赞赏
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