65 lines
1.4 KiB
C++
65 lines
1.4 KiB
C++
#include <cassert>
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#include <cctype>
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#include <functional>
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#include <iostream>
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#include <map>
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#include <regex>
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#include <set>
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#include <string>
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#include <variant>
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int do_parse(std::string const &s, std::string::size_type &pos) {
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int result = 0;
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bool ignore = false;
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while (pos < s.size()) {
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if (s[pos] == '{') {
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++pos;
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result += do_parse(s, pos);
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} else if (s[pos] == '[') {
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++pos;
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result += do_parse(s, pos);
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} else if (s[pos] == '}') {
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++pos;
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return ignore ? 0 : result;
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} else if (s[pos] == ']') {
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++pos;
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return result;
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} else if (s[pos] == '"') {
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++pos;
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auto e = s.find('"', pos);
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assert(e != std::string::npos);
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std::string v = s.substr(pos, e - pos);
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if (v == "red") {
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ignore = true;
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}
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pos = e + 1;
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} else if (std::isdigit(s[pos]) || s[pos] == '-') {
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std::size_t len = 0;
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result += std::stoi(s.substr(pos), &len);
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pos += len;
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} else {
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assert(s[pos] == ',' || s[pos] == ':');
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++pos;
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}
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}
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return result;
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}
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int parse_numbers(std::string const &s) {
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std::string::size_type pos = 0;
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int result = do_parse(s, pos);
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assert(pos == s.size());
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return result;
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}
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int main(int argc, char **argv) {
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int acc = 0;
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for (std::string line; std::getline(std::cin, line);) {
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acc += parse_numbers(line);
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}
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std::cout << "Accumulated value: " << acc << "\n";
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return 0;
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} |