19 lines
495 B
C++
19 lines
495 B
C++
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#include <iostream>
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#include <regex>
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#include <string>
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int main() {
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std::string line;
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std::regex r{"mul\\((\\d+),(\\d+)\\)"};
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int result = 0;
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while (std::getline(std::cin, line)) {
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for (std::sregex_iterator iter{line.begin(), line.end(), r}, iter_end; iter != iter_end; iter++) {
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const auto &match = *iter;
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const auto op1 = std::stoi(match[1]), op2 = std::stoi(match[2]);
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result += op1 * op2;
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}
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}
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std::cout << result << std::endl;
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return EXIT_SUCCESS;
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}
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