Let's consider m apples divided into n groups. Each group contains no more than 100 apples, arranged in a line. You can take any number of consecutive apples at one time.
For example "@@@" can be turned into "@@" or "@" or "@ @"(two piles). two people get apples one after another and the one who takes the last is
the loser. Fra wants to know in which situations he can win by playing strategies (that is, no matter what action the rival takes, fra will win).
博弈
1 #include<stdio.h>
2
3 int main(){
4 int n;
5 while(scanf("%d",&n)!=EOF){
6 int i,sum=0,num=0;
7 for(i=1;i<=n;i++){
8 int a;
9 scanf("%d",&a);
10 if(a>1)num++;
11 sum^=a;
12 }
13 if((num==0&&sum==0)||(sum>0&&num>0))printf("Yes
");
14 else printf("No
");
15 }
16 return 0;
17 }