serial.c

#include<stdio.h>
#include<stdlib.h>
#include<time.h>
#include<omp.h>

int main() {

    int graph[200][200];

    time_t t;
    srand((unsigned) time(&t));

    for (int m=0;m<200;m++) {
        for(int o=0;o<200;o++) {
            graph[m][o] = rand() % 2;

            if(m==o) {
                graph[m][o] = graph[o][m];
            }
        }
    }

    long double start = omp_get_wtime();

    int i=0,j=0,k=0,l=0;
    int count=0;


    for(i=0;i<200;i++) {
        for (j=i;j<200;j++) {
            for(k=j;k<200;k++){
                for(l=k;l<200;l++) {
                    if(graph[i][j] && i!=j) {
                        if(graph[i][k] && graph[j][k] && k!=j && k!=i) {
                            count++;
                            printf("[%d %d %d %d]\n", i, j, k, l);
                        }
                    }
                }
            }
        }
    }

    printf("\n%Lf\n", omp_get_wtime()-start);

    printf("Num : %d\n", count);

    return 0; 
}