58 lines
994 B
Plaintext
58 lines
994 B
Plaintext
#include "sylib.h"
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#define maxN 30
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#define maxM 600
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int store[maxN], n, m;
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int graph[maxN][maxN];
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int is_clique(int num) {
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int i = 1;
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while (i < num) {
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int j = i + 1;
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while (j < num) {
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if (graph[store[i]][store[j]] == 0)
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return 0;
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j = j + 1;
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}
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i = i + 1;
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}
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return 1;
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}
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int maxCliques(int i, int k) {
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int max_ = 0;
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int j = 1;
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i = 1;
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while (j <= n) {
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store[k] = j;
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if (is_clique(k + 1)) {
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if (k > max_) max_ = k;
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int tmp = maxCliques(j, k + 1);
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if (tmp > max_) max_ = tmp;
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}
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j = j + 1;
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}
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return max_;
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}
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int main() {
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n = getint();
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m = getint();
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int edges[maxM][2];
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int i = 0;
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while (i < m) {
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edges[i][0] = getint();
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edges[i][1] = getint();
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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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graph[edges[i][0]][edges[i][1]] = 1;
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graph[edges[i][1]][edges[i][0]] = 1;
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i = i + 1;
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}
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putint(maxCliques(0, 1));
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return 0;
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}
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