{"id":74,"date":"2011-09-21T13:27:24","date_gmt":"2011-09-21T04:27:24","guid":{"rendered":"http:\/\/tech.fuqinho.net\/?p=74"},"modified":"2011-09-21T13:27:24","modified_gmt":"2011-09-21T04:27:24","slug":"gcj-japan-2011-%e7%b7%b4%e7%bf%92%e5%95%8f%e9%a1%8c%e6%95%b0%e3%81%ae%e9%9b%86%e5%90%88","status":"publish","type":"post","link":"https:\/\/tech.fuqinho.net\/?p=74","title":{"rendered":"GCJ Japan 2011 \u7df4\u7fd2\u554f\u984c\/\u6570\u306e\u96c6\u5408"},"content":{"rendered":"

\t\t\t\t\u8077\u5834\u306e\u5148\u8f29\u304cLarge\u306e\u7b54\u3048\u304c\u5408\u308f\u306a\u3044\u3063\u3066\u8a00\u3063\u3066\u305f\u306e\u3067\u50d5\u3082\u89e3\u3044\u3066\u307f\u305f\u3002<\/p>\n

\u3084\u308a\u65b9\u306f\u3001\u4f8b\u3048\u3070sample\u306e\u901a\u308a10-20\u306e\u533a\u9593\u3067P=3\u306e\u5834\u5408\u3001<\/p>\n

    \n
  1. 3\u306e\u500d\u657012,15,18\u3092\u53d6\u308a\u51fa\u3059\u3002\u3053\u306e\u6bb5\u968e\u3067\u30b0\u30eb\u30fc\u30d7\u6570\u306f-3<\/li>\n
  2. \u53d6\u308a\u51fa\u3057\u305f\u6570\u306f\u5168\u90e8\u72ec\u7acb\u3057\u3066\u305f\u306e\u3067\u3001\u65b0\u305f\u306b\u30b0\u30eb\u30fc\u30d7\u304c1\u3064\u3067\u304d\u308b\u3002\u30b0\u30eb\u30fc\u30d7\u6570+1<\/li>\n
  3. 5\u306e\u500d\u657010,15,20\u3092\u53d6\u308a\u51fa\u3059\u3002\u3053\u306e\u6bb5\u968e\u3067\u30b0\u30eb\u30fc\u30d7\u6570\u306f-2\u3002(15\u306f\u72ec\u7acb\u3057\u3066\u306a\u3044\u306e\u3067\u53d6\u308a\u51fa\u3057\u3066\u3082\u30b0\u30eb\u30fc\u30d7\u304c\u6e1b\u3089\u306a\u3044\u3002\u3060\u304b\u3089-3\u3058\u3083\u306a\u3044\u3002)<\/li>\n
  4. \u65e2\u306b\u30b0\u30eb\u30fc\u30d7\u306b\u5165\u3063\u3066\u308b15\u3092\u542b\u3080\u306e\u3067\u3001\u65b0\u305f\u306b\u30b0\u30eb\u30fc\u30d7\u306f\u51fa\u6765\u306a\u3044(\u7d71\u5408\u3055\u308c\u308b)\u3002\u30b0\u30eb\u30fc\u30d7\u6570+0<\/li>\n<\/ol>\n

    \u307f\u305f\u3044\u306a\u611f\u3058\u306e\u64cd\u4f5c\u3092\u7e70\u308a\u8fd4\u3059\u3002
    \n\u3069\u306e\u6570\u304c\u3069\u3046\u30b0\u30eb\u30fc\u30d4\u30f3\u30b0\u3055\u308c\u308b\u304b\u306f\u6c17\u306b\u305b\u305a\u3001\u6570\u306e\u5897\u6e1b\u3060\u3051\u898b\u308b\u5f62\u3067\u3001\u5b9f\u884c\u6642\u9593\u306f10\u79d2\u304f\u3089\u3044\u3002<\/p>\n

    \u7d50\u679c\u2026\u3000\u305c\u3093\u305c\u3093\u9055\u3046\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u306e\u5148\u8f29\u3068\u7b54\u3048\u304c\u4e00\u81f4\u3057\u3066\u3001GCJ\u306e\u30b7\u30b9\u30c6\u30e0\u304b\u3089\u306f\u4e0d\u6b63\u89e3\u3044\u305f\u3060\u304d\u307e\u3057\u305f\u3002
    \n\u3042\u3063\u308c\u30fc\uff1f\u4e8c\u4eba\u3057\u3066\u306a\u3093\u304b\u7279\u6b8a\u306a\u30b1\u30fc\u30b9\u3092\u898b\u843d\u3068\u3057\u3066\u308b\u306e\u304b\u306a\u3002<\/p>\n

    [cpp]
    \n#include <iostream>
    \n#include <vector>
    \nusing namespace std;<\/p>\n

    static const int MAX_PRIME_NUMBER = 1000000;<\/p>\n

    int solve(vector<int>& primes, long long A, long long B, int P) {
    \n int result = B – A + 1;
    \n vector<bool> grouped(B – A + 1, false);
    \n for (int i = 0; i < primes.size(); i++) {
    \n int divisor = primes[i];
    \n if (divisor >= P && divisor < B – A + 1) {
    \n int remNum = 0;
    \n int addNum = 0;
    \n bool isInOtherGroup = false;
    \n int first = (A % divisor == 0 ? 0 : (divisor – A % divisor));
    \n for (int j = first; j < grouped.size(); j += divisor) {
    \n if (!grouped[j]) {
    \n remNum++;
    \n grouped[j] = true;
    \n } else {
    \n isInOtherGroup = true;
    \n }
    \n }
    \n if (!isInOtherGroup) {
    \n addNum = 1;
    \n }
    \n result -= remNum – addNum;
    \n }
    \n }
    \n return result;
    \n}<\/p>\n

    int main() {
    \n \/\/ prepare prime numbers
    \n vector<int> primes;
    \n vector<bool> temp(MAX_PRIME_NUMBER + 1, true);
    \n for (int i = 2; i <= MAX_PRIME_NUMBER; i++) {
    \n if (temp[i]) {
    \n primes.push_back(i);
    \n for (int j = i; j <= MAX_PRIME_NUMBER; j += i) {
    \n temp[j] = false;
    \n }
    \n }
    \n }<\/p>\n

    \/\/ read cases from standard input and print result to standard out
    \n int N, P;
    \n long long A, B;
    \n cin >> N;
    \n for (int i = 1; i <= N; i++) {
    \n cin >> A >> B >> P;
    \n int result = solve(primes, A, B, P);
    \n cout << "Case #" << i << ": " << result << endl;
    \n }<\/p>\n

    return 0;
    \n}
    \n[\/cpp]<\/p>\n","protected":false},"excerpt":{"rendered":"

    \u8077\u5834\u306e\u5148\u8f29\u304cLarge\u306e\u7b54\u3048\u304c\u5408\u308f\u306a\u3044\u3063\u3066\u8a00\u3063\u3066\u305f\u306e\u3067\u50d5\u3082\u89e3\u3044\u3066\u307f\u305f\u3002 \u3084\u308a\u65b9\u306f\u3001\u4f8b\u3048\u3070sample\u306e\u901a\u308a10-20\u306e\u533a\u9593\u3067P=3\u306e\u5834\u5408\u3001 3\u306e\u500d\u657012,15,18\u3092\u53d6\u308a\u51fa\u3059\u3002\u3053\u306e\u6bb5\u968e\u3067\u30b0\u30eb\u30fc\u30d7\u6570\u306f-3 \u53d6\u308a\u51fa\u3057\u305f\u6570\u306f\u5168 … \u7d9a\u304d\u3092\u8aad\u3080<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_mi_skip_tracking":false,"footnotes":""},"categories":[2],"tags":[5,7],"class_list":["post-74","post","type-post","status-publish","format-standard","hentry","category-2","tag-cpp","tag-googlecodejam"],"yoast_head":"\nGCJ Japan 2011 \u7df4\u7fd2\u554f\u984c\/\u6570\u306e\u96c6\u5408 - Happy Coder<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tech.fuqinho.net\/?p=74\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"GCJ Japan 2011 \u7df4\u7fd2\u554f\u984c\/\u6570\u306e\u96c6\u5408 - 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