41 lines
932 B
C++
41 lines
932 B
C++
//
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// Created by Matthew Gretton-Dann on 10/12/2021.
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//
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#include <cassert>
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#include <iostream>
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#include <map>
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#include <stack>
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#include <string>
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auto main() -> int
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{
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std::map<char, char> matches{{'(', ')'}, {'[', ']'}, {'{', '}'}, {'<', '>'}};
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std::map<char, unsigned> scores{{')', 3}, {']', 57}, {'}', 1197}, {'>', 25137}};
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std::string line;
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unsigned score{0};
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while (std::getline(std::cin, line)) {
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std::stack<char> expecting;
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for (auto c : line) {
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if (auto it = matches.find(c); it != matches.end()) {
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expecting.push(it->second);
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}
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else if (!expecting.empty()) {
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if (c == expecting.top()) {
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expecting.pop();
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}
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else {
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auto score_it{scores.find(c)};
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assert(score_it != scores.end());
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score += score_it->second;
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break;
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}
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}
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}
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}
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std::cout << "Total score: " << score << '\n';
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return 0;
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}
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