s4553711

class Solution {
public:
    bool makesquare(vector<int>& nums) {
        if (nums.empty() || nums.size() < 4) return false;
        int sum = accumulate(nums.begin(), nums.end(), 0);
        if (sum % 4 != 0) return false;
        int n = nums.size(), all = (1 << n) - 1, target = sum/4;
        vector<int> masks, validHalf(1<<n, false);
        for(int i = 0; i < all; i++) {
            int curSum = 0;

s4553711

class Solution {
public:
    vector<vector<string>> accountsMerge(vector<vector<string>>& accounts) {
        vector<vector<string>> res;
        int n = accounts.size();
        unordered_map<string, vector<int>> m;
        vector<int> visited(n, 0);
        for(int i = 0; i < n; i++) {
            for(int j = 1; j < accounts[i].size(); j++) {
                m[accounts[i][j]].push_back(i);

s4553711

package com.ck.fastq.util;

/**
 * Created by s4553711 on 2018/5/31.
 */
public class FastqReader {
    private StdinIterator reader;
    private int head = 0;
    private int mark = 0;
    private int tail = 0;

s4553711

class Solution {
public:
    bool canVisitAllRooms(vector<vector<int>>& rooms) {
        int numrooms = rooms.size();
        vector<bool> visited(numrooms, false);
        bool res = false;
        visited = dfs(rooms, 0, visited);
        for(int i = 0; i < numrooms; i++) {
            if (!visited[i]) return false;
        }

s4553711

class Solution {
public:
    vector<vector<bool>> visited;
    int n, m;
    vector<vector<char>> updateBoard(vector<vector<char>>& board, vector<int>& click) {
        int x, y;
        n = board.size();
        m = board[0].size();
        visited.assign(n, vector<bool>(m, false));
        

s4553711

class Solution {
public:
    vector<vector<int>> floodFill(vector<vector<int>>& image, int sr, int sc, int newColor) {
        if (image[sr][sc] == newColor) return image;
        int m = image.size();
        int n = image[0].size();
        floodFill(image, sc, sr, n, m, image[sr][sc], newColor);
        return image;
    }
    void floodFill(vector<vector<int>>& image, 

s4553711

/*
// Employee info
class Employee {
public:
    // It's the unique ID of each node.
    // unique id of this employee
    int id;
    // the importance value of this employee
    int importance;
    // the id of direct subordinates

s4553711

    public void consume_iterator() {
        FastqQueueReader<N> reader = new FastqQueueReader(broker);
        int i = 0;
        long prev = System.currentTimeMillis();
        double accum = 0;
        while(broker.isRunning() || reader.hasNext()) {
            N data = reader.read();
            accum += (((byte[])data).length*1.0d/(1024.0*1024.0));
            if (i % 40000 == 0) {
                long now_st = System.currentTimeMillis();

s4553711

class Solution {
public:
    int networkDelayTime(vector<vector<int>>& times, int N, int K) {
		// first v, second w
		vector<vector<pair<int, int> > > adj(N+1, vector<pair<int, int> >());
		// dist and parent
		vector<pair<int, int> > dist_p(N+1, make_pair(INT_MAX, -1));
		// visited
		vector<bool > visited(N+1, false);
		// initialize

s4553711

class Solution {
public:
    vector<double> calcEquation(vector<pair<string, string>> equations, vector<double>& values, vector<pair<string, string>> queries) {
        unordered_map<string, unordered_map<string, double>> g;
        for(int i = 0; i < equations.size(); i++) {
            const string& A = equations[i].first;
            const string& B = equations[i].second;
            const double k = values[i];
            g[A][B] = k;
            g[B][A] = 1.0 / k;