洛谷P1247 取火柴游戏

 1 #include <cstdio>
 2 const int N = 500010;
 3 int a[N];
 4 int main() {
 5     int n, sum = 0;
 6     scanf("%d", &n);
 7     for(int i = 1; i <= n; i++) {
 8         scanf("%d", &a[i]);
 9         sum ^= a[i];
10     }
11 
12     if(!sum) {
13         printf("lose");
14         return 0;
15     }
16 
17     for(int i = 1; i <= n; i++) {
18         if((a[i] ^ sum) <= a[i]) {
19             printf("%d %d\n", a[i] - (a[i] ^ sum), i);
20             a[i] = a[i] ^ sum;
21             break;
22         }
23     }
24     for(int i = 1; i <= n; i++) {
25         printf("%d ", a[i]);
26     }
27     return 0;
28 }