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WA的童鞋进!!!!(附代码)测下这组数据 1 2 1 A 1 2 答案应该是In different gangs. 就因为这个……WA到死…… #include<iostream> #define SIZE 100010 using namespace std; int tcase; int n,m,x,y; char ctrl; struct node { int pa; int ki; }a[SIZE]; void Init(int n) { for(int i=1;n-i>=0;i++) { a[i].pa=i; a[i].ki=0; } } int findPa(int n) { if(a[n].pa!=n) { int Pa=a[n].pa; int Root=findPa(a[n].pa); a[n].ki=(a[n].ki+a[Pa].ki)%2; return a[n].pa=Root; } else return n; } void Union(int x,int y) { int xx=findPa(x); int yy=findPa(y); a[xx].pa=yy; a[xx].ki=(a[y].ki-a[x].ki+1+2)%2; } int main() { scanf("%d",&tcase);while(tcase--) { scanf("%d %d",&n,&m);getchar(); Init(n); for(int i=0;m-i>0;i++) { scanf("%c %d %d",&ctrl,&x,&y);getchar(); if(n==2&&ctrl=='A') printf("In different gangs.\n"); else if(ctrl=='D') { Union(x,y); } else { int xx=findPa(x); int yy=findPa(y); if(xx!=yy) printf("Not sure yet.\n"); else if(a[x].ki==a[y].ki) printf("In the same gang.\n"); else printf("In different gangs.\n"); } } } return 0; } Followed by:
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