Electrons and Positrons
1 #include<cstdio> 2 #include<iostream> 3 #include<cstring> 4 #include<iomanip> 5 #include<algorithm> 6 #include<cstring> 7 #include<cmath> 8 #include<queue> 9 #define rep(i,j,k) for(register int i = j; i <= k; i++) 10 #define dow(i,j,k) for(register int i = j; i >= k; i--) 11 #define ll long long 12 using namespace std; 13 14 inline int read() { 15 int s = 0, t = 1; char c = getchar(); 16 while( !isdigit(c) ) { if( c == '-' ) t = -1; c = getchar(); } 17 while( isdigit(c) ) s = s * 10 + c - 48, c = getchar(); 18 return s * t; 19 } 20 21 const int N = 2e3+5, M = 4e6+5; 22 int dx[N], dy[N], cx[N], cy[N], f[N]; 23 struct edge{ int to, nxt; } e[M]; 24 int head[N], cnt = 0, ti[N], now = 0; 25 inline void clear() { memset(head,0,sizeof(head)), cnt = 0; } 26 inline void add(int x,int y) { 27 e[++cnt].to = y, e[cnt].nxt = head[x], head[x] = cnt; 28 } 29 #define ez(i,j) for(register int i = head[j]; i; i=e[i].nxt) 30 #define to e[i].to 31 inline bool check(int x) { 32 ez(i,x) { 33 if( ti[to] != now ) { 34 ti[to] = now; 35 if( !f[to] || check(f[to]) ) { f[to] = x; return 1; } 36 } 37 } 38 return 0; 39 } 40 41 int main() { 42 int q = read(); 43 while( q-- ) { 44 int x = read(), y = read(); 45 clear(); 46 rep(i,1,x) dx[i] = read(), dy[i] = read(); 47 rep(i,1,y) cx[i] = read(), cy[i] = read(); 48 rep(i,1,y) { 49 rep(j,1,x) if( dx[j] == cx[i] || dy[j] == cy[i] || abs(dx[j] - cx[i]) == abs(dy[j] - cy[i]) ) add(i,j); 50 } 51 memset(f,0,sizeof(f)); 52 int ans = 0; 53 rep(i,1,y) { 54 now++; 55 if( check(i) ) ans++; 56 } 57 cout<<ans<<endl; 58 } 59 return 0; 60 }
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