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Re:AC~~~并查集,250ms~~In Reply To:AC~~~并查集,250ms~~ Posted by:Sinit at 2016-12-27 10:54:57 > #include<stdio.h>
> const int B = 50000, C = 100000;
> int a[150005];
> int pro(int x)
> {
> while( x != a[x] )
> x = a[x];
> return x;
> }
> bool same(int x, int y)
> {
> return pro(x) == pro(y);
> }
> void connect(int x, int y)
> {
> int temp1 = pro(x), temp2 = pro(y), p;
> a[pro(temp2)] = pro(temp1);
> //压缩路径
> while( y != temp2 )
> p = y, y = a[y], a[p] = temp1;
> }
> int main()
> {
> int n, k, d, x, y, i, ans;
> scanf("%d%d", &n, &k);
> for( i=0; i<150000; i++) a[i] = i;
> for( i=0, ans=0; i<k; i++)
> {
> scanf("%d%d%d", &d, &x, &y);
> if( x <=0 || y <= 0 || x > n || y > n )
> {
> ans++;
> continue;
> }
> x--, y--;
> if( d == 1 )
> if( same(x, y+B) || same(x, y+C) ) ans++;
> else connect(x, y), connect(x+B, y+B), connect(x+C, y+C);
> else if( same(x, y) || same(x, y+C) ) ans++;
> else connect(x, y+B), connect(x+B, y+C), connect(x+C, y);
> }
> printf("%d\n", ans);
> }
>
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