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graph.c
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graph.c
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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <stddef.h>
#include "graph.h"
#include "LRUHash.h"
typedef struct edge edge;
struct edge{
uint a;
uint b;
};
uint n0;
uint n1;
static uint m;
static uint *C;
static uint *A;
static double *avg;
static uint *F = NULL;
static uint *Fv = NULL;
static uint stampF = 0;
void
loadGraph(
)
{
FILE *f = stdin;
char *line = NULL;
size_t len = 0;
char *tok;
do getline(&line, &len, f); while('c' == line[0]);
tok = strtok(line," ");
tok = strtok(NULL," ");
tok = strtok(NULL," ");
sscanf(tok, "%ud", &n0);
tok = strtok(NULL," ");
sscanf(tok, "%ud", &n1);
tok = strtok(NULL," ");
sscanf(tok, "%ud", &m);
edge *E;
E = (edge *) malloc(m*sizeof(edge));
for(uint i = 0; i < m; i++){
do getline(&line, &len, f); while('c' == line[0]);
tok = strtok(line," ");
sscanf(tok, "%ud", &E[i].a);
tok = strtok(NULL," ");
sscanf(tok, "%ud", &E[i].b);
}
avg = (double *) calloc(n1, sizeof(double));
avg -= n0+1;
edge *Ex;
Ex = (edge *) malloc(m*sizeof(edge));
C = (uint *) calloc(2+n0, sizeof(uint));
for(uint i = 0; i < m; i++) C[1+E[i].a]++;
for(uint j = 1; j < 2+n0; j++) C[j] += C[j-1];
for(uint i = 0; i < m; i++) Ex[C[E[i].a]++] = E[i];
free(C);
free(E);
E = Ex;
A = (uint *) malloc(m*sizeof(uint));
C = (uint *) calloc(3+n1, sizeof(uint));
C -= n0;
for(uint i = 0; i < m; i++) C[2+E[i].b]++;
for(uint j = 1+n0; j < 3+n1+n0; j++) C[j] += C[j-1];
for(uint i = 0; i < m; i++){
avg[E[i].b] += E[i].a;
A[C[1+E[i].b]++] = E[i].a;
}
free(E);
for(uint j = 1+n0; j <= n1+n0; j++)
if(0 != deg(j))
avg[j] /= deg(j);
free(line);
F = (uint *)calloc(n0+2, sizeof(uint));
Fv = (uint *)calloc(n0+2, sizeof(uint));
stampF = 0;
uint a = 10*n1;
if(a < m) a = m;
hashInit(a);
}
uint
deg(uint j)
{
return C[j+1]-C[j];
}
uint *
Adj(uint j)
{
return &A[C[j]];
}
double
getAvg(uint j)
{
return avg[j];
}
void
freeAvg(void)
{
free(&avg[n0+1]);
}
void
freeGraph(void)
{
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wfree-nonheap-object"
free(&C[n0]);
#pragma GCC diagnostic pop
free(A);
free(F);
free(Fv);
hashFree();
}
void
printGraph(void)
{
printf("B= ");
for(uint j = n0+1; j <= n0+n1; j++)
printf("%2d ", j);
putchar('\n');
printf("A= ");
for(uint i = 1; i <= n0; i++)
printf("%2d ", i);
putchar('\n');
for(uint j = n0+1; j <= n0+n1; j++){
printf("%2d: ", j);
uint di = 0;
for(uint i = 1; di < deg(j) && i <= n0; i++){
if(Adj(j)[di] == i){
printf("%2d ", i);
di++;
} else printf(" ");
}
printf("\n");
}
}
uint
cjj(uint j, uint jj)
{
uint res = search(j, jj);
if((uint)-1 == res){
res = 0;
uint *la = Adj(j);
uint nl = deg(j);
uint *ra = Adj(jj);
uint nr = deg(jj);
uint i = 0;
uint jjj = j;
j = 0;
while(i < nl && j < nr){
if(la[i] == ra[j]){
i++;
res+=j;
j++;
} else {
if(la[i] < ra[j]){
uint p2 = 1;
uint a = i;
while(i+p2 < nl && la[i+p2] < ra[j]) p2 <<= 1;
uint b = i+p2;
if(b >= nl) b = nl;
while(a+1 < b){
uint m = a + (b - a)/2;
if(la[m] < ra[j]) a = m;
else b = m;
}
res += j*(b-i);
i = b;
} else {
uint p2 = 1;
uint a = j;
while(j+p2 < nr && la[i] > ra[j+p2]) p2 <<= 1;
uint b = j+p2;
if(b >= nr) b = nr;
while(a+1 < b){
uint m = a + (b - a)/2;
if(la[i] > ra[m]) a = m;
else b = m;
}
j = b;
}
}
}
res += j*(nl-i);
insert(jjj, jj, res);
}
return res;
}
static uint
queryF(uint i)
{
uint s = 0;
while(0 < i){
if(stampF != Fv[i]){
Fv[i] = stampF;
F[i] = 0;
}
s += F[i];
i -= i&-i;
}
return s;
}
static void
updateF(uint i, uint v)
{
while(i <= n0){
if(stampF != Fv[i]){
Fv[i] = stampF;
F[i] = 0;
}
F[i] += v;
i += i&-i;
}
}
uint
totalCross(uint m, uint *L)
{
stampF++;
if(0 == stampF){
bzero(Fv, (n0+2)*sizeof(uint));
stampF++;
}
uint res = 0;
for(uint j = 0; j < m; j++){
uint *A = Adj(L[j]);
uint d = deg(L[j]);
for(uint i = 0; i < d; i++){
res += queryF(n0-A[i]);
updateF(1+n0-A[i], 1);
}
}
return res;
}
uint
getSize(void)
{
return n0+n1;
}
Fnv64_t
getFNV(void)
{
Fnv64_t h = 0;
h = fnv_64_buf(&n0, sizeof(uint), h);
h = fnv_64_buf(&n1, sizeof(uint), h);
h = fnv_64_buf(&m, sizeof(uint), h);
h = fnv_64_buf(&C[1], n1*sizeof(uint), h);
h = fnv_64_buf(A, m*sizeof(uint), h);
return h;
}