28 lines
981 B
C++
28 lines
981 B
C++
#include <chrono>
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#include <iostream>
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#include <vector>
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int main() {
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const std::vector<std::chrono::month> long_months = { std::chrono::January, std::chrono::March,
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std::chrono::May, std::chrono::July, std::chrono::August, std::chrono::October, std::chrono::December };
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int month_count = 0;
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int blank_years = 0;
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for ( int y = 1900; y <= 2100; ++y ) {
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bool blank_year = true;
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for ( std::chrono::month m : long_months ) {
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std::chrono::year_month_day first_of_month{std::chrono::year{y}, m, std::chrono::day{1}};
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if ( std::chrono::weekday{first_of_month} == std::chrono::Friday ) {
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std::cout << first_of_month.year() << " " << first_of_month.month() << std::endl;
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month_count++;
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blank_year = false;
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}
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}
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if ( blank_year ) {
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blank_years++;
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}
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}
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std::cout << "Found " << month_count << " months with five Fridays, Saturdays and Sundays." << std::endl;
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std::cout << "There were " << blank_years << " years with no such months." << std::endl;
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}
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