int maxPoints(vector<Point> &points) {
if(points.size()<3) return points.size();
int repeat = countRepeat(0,points);
if(repeat == points.size()) return repeat; // 有可能有点重合，这样的话算斜率是算不出来的
unordered_map<double,int> mdi; // 斜率对应的点数表
unordered_map<double, int> marks; // 斜率表
int mp = 2;
for(int i=0;i<points.size();i++){
for(int j=i+1;j<points.size();j++){
if(points[i].x == points[j].x && points[i].y == points[j].y) continue;
double a = points[i].x - points[j].x;
double b = points[i].y - points[j].y;
double k = a? b/a:(double)INT_MAX; // 斜率最大可以单独 考虑么？
if(!marks.count(k)){ //若该斜率不存在
marks[k] = i+1; // 新建这个斜率 mark 表
mdi[k] = repeat+1;
}
else if(marks[k] == i+1) mdi[k]++; // 该斜率已经存在的话 只能计算当时的这一波点，下一波的话会重复算点的。
}
for(auto it: mdi) mp = max(mp,it.second);
repeat = countRepeat(i+1,points);
mdi.clear();
}
return mp;
}
void QCalendarDateValidator::setFormat(const QString &format)
{
clear();
int pos = 0;
const QLatin1String quote("'");
bool quoting = false;
QString separator;
while (pos < format.size()) {
QString mid = format.mid(pos);
int offset = 1;
if (mid.startsWith(quote)) {
quoting = !quoting;
} else {
const QChar nextChar = format.at(pos);
if (quoting) {
separator += nextChar;
} else {
SectionToken *token = 0;
if (nextChar == QLatin1Char('d')) {
offset = qMin(4, countRepeat(format, pos));
token = new SectionToken(m_dayValidator, offset);
} else if (nextChar == QLatin1Char('M')) {
offset = qMin(4, countRepeat(format, pos));
token = new SectionToken(m_monthValidator, offset);
} else if (nextChar == QLatin1Char('y')) {
offset = qMin(4, countRepeat(format, pos));
token = new SectionToken(m_yearValidator, offset);
} else {
separator += nextChar;
}
if (token) {
m_tokens.append(token);
m_separators.append(separator);
separator = QString();
if (!m_currentToken)
m_currentToken = token;
}
}
}
pos += offset;
}
m_separators += separator;
}
