58 lines
1.1 KiB
C++
58 lines
1.1 KiB
C++
#include <algorithm>
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#include <cassert>
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#include <iostream>
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#include <list>
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#include <map>
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#include <regex>
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#include <string>
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template<std::size_t L>
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struct Buffer
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{
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Buffer() {}
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bool add_value(std::string const& s)
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{
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unsigned long i = std::stoul(s);
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auto size = buf_.size();
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if (size == L && !valid(i)) {
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return false;
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}
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if (size == L) {
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buf_.pop_front();
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}
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buf_.push_back(i);
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return true;
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}
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private:
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bool valid(unsigned long v) const
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{
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assert(buf_.size() == L);
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for (auto i = buf_.begin(); i != buf_.end(); ++i) {
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auto j = i;
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for (++j; j != buf_.end(); ++j) {
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if (v == *i + *j) {
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std::cout << "v = "
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<< " " << *i << " + " << *j << "\n";
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return true;
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}
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}
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}
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return false;
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}
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std::list<unsigned long> buf_;
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};
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int main(int argc, char** argv)
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{
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Buffer<25> buf;
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for (std::string line; std::getline(std::cin, line);) {
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if (!buf.add_value(line)) {
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std::cout << "Invalid: " << line << "\n";
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return 0;
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}
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}
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return 0;
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} |