sysy-data/hidden_functional_c/sy/17_maximal_clique.sy

58 lines
939 B
Plaintext
Raw Normal View History

2024-06-02 22:04:54 +08:00
#include "sylib.h"
2024-06-14 13:25:10 +08:00
#define maxN 30
#define maxM 600
int store[maxN], n, m;
int graph[maxN][maxN];
int is_clique(int num) {
int i = 1;
while (i < num) {
int j = i + 1;
while (j < num) {
if (graph[store[i]][store[j]] == 0)
return 0;
j = j + 1;
}
i = i + 1;
}
return 1;
}
int maxCliques(int i, int k) {
int max_ = 0;
int j = 1;
i = 1;
while (j <= n) {
store[k] = j;
if (is_clique(k + 1)) {
if (k > max_) max_ = k;
int tmp = maxCliques(j, k + 1);
if (tmp > max_) max_ = tmp;
}
j = j + 1;
}
return max_;
}
int main() {
n = getint();
m = getint();
int edges[maxM][2];
int i = 0;
while (i < m) {
edges[i][0] = getint();
edges[i][1] = getint();
i = i + 1;
}
i = 0;
while (i < m) {
graph[edges[i][0]][edges[i][1]] = 1;
graph[edges[i][1]][edges[i][0]] = 1;
i = i + 1;
}
putint(maxCliques(0, 1));
return 0;
}