C. Iahub and Permutationstime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard output distinct integers a, a, ..., an ai ≤ n). She replaces some of permutation elements with -1 value
Hangover,如下: 1/3 5/6 card lengths. In general you can make cards overhang by 1/2 1/3 1/4 ... 1/( 1) card lengths, where the top card overhangs the second by 1/2,
http://codeforces.com/contest/349/problem/BIgor has fallen in love with Tanya. Now Igor wants to show his feelings and write a number on the fence opposite to Tanya's house. Igor thinks that the larger the number is, the more chance to win Tanya's
,一旦建立就不能改變。對於已經存在String對象我們要去修改都是要可變對象,改變的時候,直接在原地址後面修改。public class testString{public static void main(String args[]){String str = new String(); long start = System.currentTimeMillis();final int times = 1000;for(int i=0;
#include <iostream>#include <cstdio>#include <cstring>#include <cmath>#include <algorithm>#include <vector>#define pii pair<int,LL>using namespace std;typedef long long LL;const int N = 100005;struct Trie {
float** a;a= new float*[5]; for (j=0; j<5; j++){a[j] = new float[2];}float** a;a= new float*[5]; for (j=0; j<5; j++){a[j] = new float;}for (i=0; i<5; i++){delete[] a[i];a[i]=NULL;}delete[] a;a=NULL;a[0][0]=2;a[0][1]=4