hdu 2149【巴什博奕】

來源:互聯網
上載者:User

http://acm.hdu.edu.cn/showproblem.php?pid=2149

簡單的bash博弈,如果滿足m%(n+1)==0,則先手敗(必敗態),因為可以這樣想:每輪後手總可以造出n+1這樣的情況,最後明顯是後手必勝。

但是當m%(n+1)!=0,則先手要不敗就應該取m%(n+1)的餘數,因為當第一次先手取這個餘數後,就變成了後手的必敗態。

#include <vector>#include <list>#include <map>#include <set>#include <queue>#include <string.h>#include <deque>#include <stack>#include <bitset>#include <algorithm>#include <functional>#include <numeric>#include <utility>#include <sstream>#include <iostream>#include <iomanip>#include <cstdio>#include <cmath>#include <cstdlib>#include <limits.h>using namespace std;int lowbit(int t){return t&(-t);}int countbit(int t){return (t==0)?0:(1+countbit(t&(t-1)));}int gcd(int a,int b){return (b==0)?a:gcd(b,a%b);}#define LL __int64#define pi acos(-1)#define N  100010#define INF INT_MAX#define eps 1e-8int main(){    int m,n;    while(scanf("%d%d",&m,&n)!=EOF)    {        if(m%(n+1)==0)        {            printf("none\n");            continue;        }        if(n>=m)        {            int flag=0;            for(int i=m;i<=n;i++)            {                if(flag)                printf(" %d",i);                else                printf("%d",i);                flag=1;            }            printf("\n");            continue;        }        printf("%d\n",m%(n+1));    }    return 0;}

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