This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "bits/stdc++.h"
using namespace std;
#define int long long
vector <int> color;
vector <vector <int>> cntColor, g, dp;
signed main () {
int n, m, k;
cin >> n >> m >> k;
color.resize(n);
cntColor.resize(n, vector <int> (k + 1, 0));
g.resize(n);
for(int i = 0; i < n; i ++) cin >> color[i];
for(int i = 0, u, v; i < m; i ++) {
cin >> u >> v;
u --, v --;
g[u].push_back(v);
g[v].push_back(u);
cntColor[u][color[v]] ++;
cntColor[v][color[u]] ++;
}
int ans = 0;
for(int color2 = 1; color2 <= k; color2 ++) {
for(int i = 0; i < n; i ++) {
if(color[i] == color2) {
for(int color1 = 1; color1 <= k; color1 ++) {
if(color1 == color2) continue;
ans += cntColor[i][color1];
if(k == 2) continue;
for(int color3 = color1 + 1; color3 <= k; color3 ++) {
if(color3 == color2) continue;
ans += 2 * (cntColor[i][color1] * cntColor[i][color3]);
}
}
}
}
}
if(k >= 4) {
for(int v = 0; v < n; v ++) {
for(auto u : g[v]) {
if(color[u] == color[v]) continue;
for(int i = 1; i <= k; i ++) {
if(i == color[u] || color[v] == i) continue;
for(int j = 1; j <= k; j ++) {
if(j == i || j == color[u] || j == color[v]) continue;
ans += cntColor[v][i] * cntColor[u][j];
}
}
}
}
}
if(k >= 5) {
dp.resize(n, vector <int> (1 << (k + 1)));
for(int i = 0; i < n; i ++) {
for(int color1 = 1; color1 <= k; color1 ++) {
for(int color2 = color1 + 1; color2 <= k; color2 ++) {
int cnt = 0;
for(auto u : g[i]) {
if(color[u] == color1 || color[u] == color2) cnt ++;
}
dp[i][(1 << color1) ^ (1 << color2)] = cnt;
}
}
}
/*for(int mid = 0; mid < n; mid ++) {
for(auto l : g[mid]) {
if(color[mid] == color[l]) continue;
for(auto r : g[mid]) {
if(color[mid] == color[r] || color[l] == color[r]) continue;
int bitVal = ((1 << (k + 1)) - 1) ^ (1 << mid) ^ (1 << l) ^ (1 << r);
ans += dp[l][bitVal] * dp[r][bitVal];
}
}
}*/
}
cout << ans;
return 0;
}
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