UVALIVE 2686 Stargates

尼玛真深坑合时p[x] = y 就RE，p[y] = x 就AC 、

#include <map>
#include <set>
#include <list>
#include <cmath>
#include <ctime>
#include <deque>
#include <stack>
#include <queue>
#include <cctype>
#include <cstdio>
#include <string>
#include <vector>
#include <climits>
#include <cstdlib>
#include <cstring>
#include <iostream>
#include <algorithm>
#define LL long long
#define PI 3.1415926535897932626
using namespace std;
int gcd(int a, int b) {return a % b == 0 ? b : gcd(b, a % b);}
#define MAXN 6066010
int p[MAXN];
int Find(int x) { return x == p[x] ? x : p[x] = Find(p[x]);}
char op;
char res[100];
int src,des,nnn,srcstep,desstep;
int read(char *res)
{
    int cnt = 0, cas = 0;
    for (int i = 1; i < strlen(res); i++)
        if (res[i] != ' ' && res[i - 1] == ' ') cnt++;
    return cnt;
}
int main()
{
    while (gets(res))
    {
        op = tolower(res[0]);
        int N;
        if (op == 'd') {sscanf(res,"%*s %d",&N);for (int i = 0; i <= N; i++)  p[i] = i; continue;}
        int cnt = read(res);
        if (cnt == 2)
        {
            sscanf(res,"%*s %d %d",&src,&des);
            nnn = 1;
            srcstep = 0; desstep = 0;
        }
        if (cnt == 3)
        {
            sscanf(res,"%*s %d %d %d",&src,&des,&nnn);
            srcstep = 0;
            desstep = 1;
        }
        if (cnt == 4)
        {
            sscanf(res,"%*s %d %d %d %d",&src,&des,&nnn,&desstep);
            srcstep = 0;
        }
        if (cnt == 5)
        {
            sscanf(res,"%*s %d %d %d %d %d",&src,&des,&nnn,&desstep,&srcstep);
        }
        if (op == 'c'){
            if (srcstep == 0 && desstep==0)nnn=1;
            for (int i = src , j = des, k = 0; k < nnn; i += srcstep,j += desstep,k++)
            {
                int  x = Find(i) , y = Find(j);
                 p[y] = x;
            }
        }
        else
        {
            int ansl = 0 ,ansr = 0;
            for (int i = src , j = des, k = 0; k < nnn; i += srcstep,j += desstep,k++)
            {
                int  x = Find(i) , y = Find(j);
                if (x != y) ansr++;
                else ansl++;
            }
            printf("%d - %d\n",ansl,ansr);
        }
    }
    return 0;
}