func_code_string: #include <bits/stdc++.h>   using namespace std;   const int Max = 1e5 + 5;   struct node {     int x, y;   } Node1[Max], Node2[Max];   int hash1[Max], hash2[Max];   bool cmp(const node a, const node b) {     if (a.y == b.y) return a.x < b.x;     return a.y < b.y;   }   int main() {     int n, m;     while (scanf( %d%d , &n, &m) != EOF) {       memset(hash1, 0, sizeof(hash1));       memset(hash2, 0, sizeof(hash2));       for (int i = 0; i < n; ++i) {         scanf( %d%d , &Node1[i].x, &Node1[i].y);         hash1[Node1[i].y]++;       }       for (int i = 0; i < m; ++i) {         scanf( %d%d , &Node2[i].x, &Node2[i].y);         hash2[Node2[i].y]++;       }       int coun = 0;       for (int i = 0; i <= 1000; ++i) {         if (hash1[i] > 0 && hash2[i] > 0)           coun += (max(hash1[i], hash2[i]) - abs(hash1[i] - hash2[i]));       }       sort(Node1, Node1 + n, cmp);       sort(Node2, Node2 + m, cmp);       int i = 0, j = 0, cou = 0;       while (i < n && j < m) {         if (Node1[i].y == Node2[j].y) {           if (Node1[i].x == Node2[j].x) {             cou++;             i++;             j++;           } else if (Node1[i].x < Node2[j].x)             i++;           else             j++;         } else if (Node1[i].y < Node2[j].y)           i++;         else           j++;       }       printf( %d %d n , coun, cou);     }     return 0;   }   