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why设了一个bool good,来判断这个编号的人有没有进行分组,如果两个人有一个没有在前面的D中出现,就输出NOt sure。然后再判断是不是在一个集合里,输出same or different。这样是WA的。 > > 看了网上的题解,先是判断是否在一个集合,是的话就是same,在判断x与y+N是不是一个集合的(就是他们是不是敌人),输出different,最后再输出Not sure。 > > 这样两个逻辑有什么差别?求大神解答。 /* * Created: 2016年03月27日 20时02分22秒 星期日 * Author: Akrusher * */ #include <cstdio> #include <cstdlib> #include <cstring> #include <cmath> #include <ctime> #include <iostream> #include <algorithm> #include <string> #include <vector> #include <deque> #include <list> #include <set> #include <map> #include <stack> #include <queue> #include <numeric> #include <iomanip> #include <bitset> #include <sstream> #include <fstream> using namespace std; #define rep(i,a,n) for (int i=a;i<n;i++) #define per(i,a,n) for (int i=n-1;i>=a;i--) #define in(n) scanf("%d",&(n)) #define in2(x1,x2) scanf("%d%d",&(x1),&(x2)) #define inll(n) scanf("%I64d",&(n)) #define inll2(x1,x2) scanf("%I64d%I64d",&(x1),&(x2)) #define inlld(n) scanf("%lld",&(n)) #define inlld2(x1,x2) scanf("%lld%lld",&(x1),&(x2)) #define inf(n) scanf("%f",&(n)) #define inf2(x1,x2) scanf("%f%f",&(x1),&(x2)) #define inlf(n) scanf("%lf",&(n)) #define inlf2(x1,x2) scanf("%lf%lf",&(x1),&(x2)) #define inc(str) scanf("%c",&(str)) #define ins(str) scanf("%s",(str)) #define out(x) printf("%d\n",(x)) #define out2(x1,x2) printf("%d %d\n",(x1),(x2)) #define outf(x) printf("%f\n",(x)) #define outlf(x) printf("%lf\n",(x)) #define outlf2(x1,x2) printf("%lf %lf\n",(x1),(x2)); #define outll(x) printf("%I64d\n",(x)) #define outlld(x) printf("%lld\n",(x)) #define outc(str) printf("%c\n",(str)) #define pb push_back #define mp make_pair #define fi first #define se second #define SZ(x) ((int)(x).size()) #define mem(X,Y) memset(X,Y,sizeof(X)); typedef vector<int> vec; typedef long long ll; typedef pair<int,int> P; const int dx[4]={1,0,-1,0},dy[4]={0,1,0,-1}; const int INF=0x3f3f3f3f; const ll mod=1e9+7; ll powmod(ll a,ll b) {ll res=1;a%=mod;for(;b;b>>=1){if(b&1)res=res*a%mod;a=a*a%mod;}return res;} const bool AC=true; int par[100005*2]; int ran[100005*2]; void init(int n){ rep(i,0,n){ par[i]=i; ran[i]=0; } } int find(int x){ if(par[x]==x) return x; else return par[x]=find(par[x]); } void unite(int x,int y){ x=find(x); y=find(y); if(x==y) return ; if(ran[x]<ran[y]){ par[x]=y; } else{ par[y]=x; if(ran[x]==ran[y]) ran[x]++; } } bool same(int x,int y){ return find(x)==find(y); } int main() { int t,n,m,x,y,a,b; char s[6]; in(t); while(t--){ in2(n,m); init(2*n); rep(i,0,m){ ins(s); in2(x,y); a=x-1; b=y-1; if(s[0]=='A'){ if(n==2) printf("In different gangs.\n");//否则可能会wa else{ if(same(a,b)) printf("In the same gang.\n"); else if(same(a,b+n)) printf("In different gangs.\n"); else printf("Not sure yet.\n"); } } else if(s[0]=='D'){ unite(a,b+n); unite(a+n,b); } } } return 0; } Followed by: Post your reply here: |
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