开始计概A下半学期。
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#include <iostream>
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std::size_t calc_digits(std::string num) {
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if (num == "0") { return 1; }
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std::size_t ans = num.size(), i = 0;
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while (num[i] == '0') {
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i++;
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ans--;
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}
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return ans;
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}
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int main() {
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std::ios::sync_with_stdio(false);
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std::cin.tie(nullptr);
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std::string num;
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std::cin >> num;
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std::cout << calc_digits(num) << std::endl;
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return 0;
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}
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