【HDOJ5978】To begin or not to begin（概率）

题意：有k个黑球和1个红球，两个轮流抽，抽到红球算赢，问先手赢的概率大还是后手大还是相等

k<=1e5

思路：手算前几项概率

大胆猜想

 #include<cstdio>
 #include<cstring>
 #include<string>
 #include<cmath>
 #include<iostream>
 #include<algorithm>
 #include<map>
 #include<set>
 #include<queue>
 #include<vector>
 using namespace std;
 typedef long long ll;
 typedef unsigned int uint;
 typedef unsigned long long ull;
 typedef pair<int,int> PII;
 typedef vector<int> VI;
 #define fi first
 #define se second
 #define MP make_pair
 #define N   110000
 #define MOD 1000000007
 #define eps 1e-8
 #define pi acos(-1)

 int n;

 int read()
 {
    int v=,f=;
    char c=getchar();
    while(c<||<c) {if(c=='-') f=-; c=getchar();}
    while(<=c&&c<=) v=(v<<)+v+v+c-,c=getchar();
    return v*f;

 }

 int main()
 {
     //freopen("H.in","r",stdin);
     //freopen("H.out","w",stdout);
     while(scanf("%d",&n)!=EOF)
     {
         if(n%) printf("0\n");
          else printf("1\n");
     }
     return ;
 }