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1833. [ZJOI2010] count 数字计数
https://hydro.ac/d/bzoj/record/6322bfef32ae6c3198cc69d5
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BZOJ/1833/1833.cpp
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62
BZOJ/1833/1833.cpp
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#include <iostream>
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#include <vector>
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using std::cin;
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using std::cout;
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const char endl = '\n';
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long long a, b,
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f[15], g[15]{1},
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cnt_a[10], cnt_b[10];
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std::vector<int> gen(long long x) {
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std::vector<int> res;
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while (x) {
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res.push_back(x % 10);
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x /= 10;
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}
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return res;
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}
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void calc(long long x, long long* r) {
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auto num = gen(x);
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for (int i = num.size(); i; i--) {
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for (int j = 0; j < 10; j++) {
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r[j] += f[i - 1] * num.at(i - 1);
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}
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for (int j = 0; j < num[i - 1]; j++) {
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r[j] += g[i - 1];
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}
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x -= g[i - 1] * num[i - 1];
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r[num[i - 1]] += x + 1;
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r[0] -= g[i - 1];
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}
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}
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int main() {
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std::ios::sync_with_stdio(false);
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cin.tie(nullptr);
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cin >> a >> b;
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for (int i = 1; i <= 12; i++) {
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f[i] = f[i - 1] * 10 + g[i - 1];
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g[i] = g[i - 1] * 10;
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}
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calc(a - 1, cnt_a);
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calc(b, cnt_b);
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for (int i = 0; i < 10; i++) {
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cout << cnt_b[i] - cnt_a[i] << ' ';
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}
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cout << endl;
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return 0;
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}
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