49 lines
785 B
Plaintext
49 lines
785 B
Plaintext
#include "sylib.h"
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#define maxN 1005
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int parent[maxN];
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int find(int root) {
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if (parent[root] == root)
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return root;
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else {
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parent[root] = find(parent[root]);
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return parent[root];
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}
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}
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void merge(int p, int q) {
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int root_p, root_q;
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root_p = find(p);
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root_q = find(q);
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if (root_p != root_q) {
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parent[root_q] = root_p;
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}
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return;
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}
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int main() {
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int n = getint(), m = getint(), i;
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int p, q;
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i = 0;
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while (i < n) {
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parent[i] = i;
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i = i + 1;
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}
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i = 0;
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while (i < m) {
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p = getint();
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q = getint();
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merge(p, q);
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i = i + 1;
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}
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int clusters = 0;
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i = 0;
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while (i < n) {
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if (parent[i] == i) clusters = clusters + 1;
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i = i + 1;
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}
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putint(clusters);
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return 0;
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}
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