标签：pac wing nim nbsp space class main put cin
//a1 ^ a2 ^ ··· ^ an = 0 –>先手必败； //a1 ^ a2 ^ ··· ^ an != 0 –>先手必胜； #include<iostream> using namespace std; int main() { int n; cin >> n; int res = 0; while(n --) { int x; cin >> x; res ^= x; } if (res) puts("Yes"); else puts("No"); return 0; }
标签：pac wing nim nbsp space class main put cin
原文地址：https://www.cnblogs.com/QingyuYYYYY/p/11918940.html
