url = [NSURL URLWithString:kOverlyAttachedGirlfriendURLString]; break; case 1: url = [NSURL URLWithString:kSuccessKidURLString]; break; case 2: url = [NSURL URLWithString:kLotsOfFacesURLString]; break; default: break; } dispatch_group_enter(downloadGroup);// 2 Photo *photo = [[Photo a...
#define ss(str) scanf("%s", str) #define rep(i, a, n) for (int i = a; i <= n; i++) #define per(i, a, n) for (int i = n; i >= a; i--) #define mem(a, n) memset(a, n, sizeof(a)) #define debug(x) cout << #x << ": " << x << endl #define pb ...
#include<string> #include<map> #include<cmath> #include<vector> constintmaxn=2e4+100; constintmod=10000; #defineme(a) memset(a,0,sizeof(a)) #definell long long usingnamespacestd; llgcd(ll a,ll b) { if(!b) returna; returngcd(b,a%b); } intmain() { intt; ll a,b,k,i...
vector<string> split(const string &); /* * Complete the 'solve' function below. * * The function is expected to return an INTEGER. * The function accepts following parameters: * 1. INTEGER n * 2. INTEGER m */ int solve(int n, int m) { } int main() { ofstream fout(getenv("...
GCD, after many years of loyal service, has started to show its age a little. In pathological cases, it can cause explosions in the number of threads it creates, and can have other, more subtle issues as well. You can read about some of these issueshereandhere. In this guide, I’ll...
NSUInteger numberOfValuesRequired=1000;if([self hasFileAlreadyBeenCreated] ==NO) {//如果没有这1000个随机数的数组,我们创建一个dispatch_sync(concurrentQueue, ^{ NSMutableArray*arrayOfRandomNumbers =[[NSMutableArray alloc]initWithCapacity:numberOfValuesRequired];for(NSUInteger counter =0; counter < ...
She will choose a continuous subsequence [l, r] and a prime parameter x each time and for every l≤i≤r, she will change ai into ai*x. To simplify the problem, x will be 2 or 3. After m operations, Hakase wants to know what is the greatest common divisor of all the numbers....
// Get the path to the website directory NSString* websitePath = [[NSBundle mainBundle] pathForResource:@"Website" ofType:nil]; // Add a default handler to serve static files (i.e. anything other than HTML files) [self addGETHandlerForBasePath:@"/" directoryPath:websitePath indexFile...
In iOS, Apple provides two ways to do multitasking: TheGrand Central Dispatch (GCD)andNSOperationQueueframeworks. Both of them work perfectly when it’s time to assign tasks to different threads, or differentqueuesother than the main one. Which one should be use is a subjective matter, but ...
#include<stdio.h>#include<string.h>#include<algorithm>usingnamespacestd;constintmaxn=1e7+5;typedeflonglongLL;LL pri[maxn],pnum;LL mu[maxn];LL g[maxn];LL sum[maxn];boolvis[maxn];voidmobius(intN){LL i,j;pnum=0;memset(vis,false,sizeof(vis));vis[1]=true;mu[1]=1;for(i=2...