SRM333Div2

250

class ChessboardPattern {
public:
  vector <string> makeChessboard(int h, int w) {
    vector <string> v;
    string s(w, '.');
    string t(w, '.');
    for(int i=0; i<w; ++i){
      if(i % 2)s[i] = 'X';
      else t[i] = 'X';
    }
    int i = h % 2;
    while( v.size() < h ){
      if(i)v.push_back( s );
      else v.push_back( t );
      i ^= 1;
    }
    return v;
  }
};

500
topcoderでまで日付の問題やりたくない。

 bool isleap(int y)
{
  if(y%4 == 0){
    if(y%100 == 0 && y%400 != 0)return false;
    return true;
  }
  return false;
}

string check(string s)
{
  const string Y = "YES";
  const string N = "NO";

  int mx[] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};

  int y = (s[0] - '0') * 10 + (s[1] - '0');
  int m = (s[2] - '0') * 10 + (s[3] - '0');
  int d = (s[4] - '0') * 10 + (s[5] - '0');

  lli sum = 0;
  for(int i=0; i<s.size(); ++i){
    sum = sum * 10 + (lli)(s[i] - '0');
  }

  if( sum % 11 )return N;

  if( 51 <= m )m -= 50;

  if(m < 1 || 12 < m)return N;

  if( d == 0 )return N;

  if( mx[m-1] + (m == 2 && isleap(y)) < d )return N;
  
  return Y;
}

class BirthNumbersValidator {
public:
  vector <string> validate(vector <string> test) {
    vector<string> v;
    for(int i=0; i<test.size(); ++i){
      v.push_back( check(test[i]) );
    }
    return v;
  }
}; 

1000