#include <algorithm>
using namespace std;
typedef struct edge
{
int u,v;
}edge;
bool cmp(edge a,edge b){return a.u==b.u ? a.v<b.v : a.u<b.u;}
long long NumberOfMaps(int N,int M,int *A,int *B)
{
edge arr[400];
int table[400]=0, n;
int chk[21]=0, cnt[21]=0, queue[21], h,t;
int i,j,m;
long long ret = 1, tmp = 1;
for(i=0;i<M;i++)
{
arr[2*i].u=A[i],arr[2*i].v=B[i];
arr[2*i+1].u=B[i], arr[2*i+1].v=A[i];
}
n=2*M;
sort(arr,arr+n,cmp);
for(i=1;i<n;i++) if(arr[i-1].u==arr[i].u && arr[i-1].v==arr[i].v) table[i]=1;
for(i=1;i<=N;i++)
{
if( chk[i]==2 ) continue;
tmp = 1, h=0, t=0;
queue[t++]=i, chk[i]=1;
while(h<t)
{
m=queue[h++];
chk[m]=2; // finish
tmp *= 4-cnt[m];
for(j=0;j<n;j++)
{
if(table[j]==1) continue;
if(arr[j].u==m)
{
if(chk[arr[j].v]<2) cnt[arr[j].v]++;
if(chk[arr[j].v]==0)
{
queue[t++]=arr[j].v;
chk[arr[j].v]=1;
}
}
}
}
ret *= tmp;
}
return ret;
}
Compilation message
map.cpp: In function 'long long int NumberOfMaps(int, int, int*, int*)':
map.cpp:14: error: array must be initialized with a brace-enclosed initializer
map.cpp:15: error: array must be initialized with a brace-enclosed initializer
map.cpp:15: error: array must be initialized with a brace-enclosed initializer
