public static int[] accum(File file, int[] accumFreq) throws Exception { //1݂̗ݐϕpxz(4122܂)
		InputStreamReader isr = new InputStreamReader(new FileInputStream(file));
		BufferedReader br = new BufferedReader(isr);
		String line = br.readLine(); //擪s(URL)
		
		int count = 0;
		while((line = br.readLine()) != null) {
			int lineInt = Integer.parseInt(line);
			for(int d=0; d<fourMonths; d++){
				if(lineInt < (d+1)*minuteaDay) accumFreq[d]++;
				else continue;
			}
			count++;
		}
		
		br.close();
		isr.close();
		
		retweetCount.put(file, count);
		if(count < RTcountMin) RTcountMin = count;
		if(count > RTcountMax) RTcountMax = count;
		
		return accumFreq;
	}