OJ-Problems-Source/HDOJ/5220_autoAC.cpp

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#include <cstdio>
#include <iostream>
#include <algorithm>
#include <cstring>
#include <vector>
#include <map>
using namespace std;
typedef long long LL;
#pragma comment(linker, "/STACK:102400000,102400000")
#define pb push_back
#define mp make_pair
#define F first
#define S second
const int N = 33;
int f[N], c[N], m[N], d[N], w[N];
vector<int> a[N], b[N];
typedef pair<int, int> pii;
map<pii, LL> g[2];
map<pii, LL>:: iterator it;
int main() {
int n, T;
scanf("%d", &T);
while (T--) {
scanf("%d", &n);
for (int i = 1; i <= 32; ++i) a[i].clear(), b[i].clear();
memset(w, 0, sizeof(w));
memset(d, 0, sizeof(d));
g[0].clear(), g[1].clear();
for (int i = 0; i < n; ++i) {
scanf("%d%d%d", &f[i], &c[i], &m[i]);
a[f[i]].pb(i), b[c[i]].pb(i);
}
bool ok = 1;
int mask = 0, cnt = 0;
for (int i = 1; i <= 32; ++i) {
if (b[i].size() == 1) {
if (d[f[b[i][0]]]) ok = 0;
mask ^= m[b[i][0]];
d[f[b[i][0]]] = 1;
}
else if (b[i].size() > 1) w[i] = cnt++;
}
if (!ok) {
puts("0");
continue;
}
int now = 0;
g[now].insert(mp(mp(0, 0), 1));
for (int i = 1; i <= 32; ++i) {
if (!a[i].size() || d[i]) continue;
g[now ^ 1] = g[now];
for (it = g[now].begin(); it != g[now].end(); it++) {
pii st = it -> F;
LL d = it -> S;
for (int j = 0; j < a[i].size(); ++j) {
int t = a[i][j];
pii tmp = mp(st.F ^ m[t], st.S | (1 << w[c[t]]));
g[now ^ 1][tmp] += d;
}
}
now ^= 1;
}
printf("%I64d\n", g[now][mp(mask, (1 << cnt) - 1)]);
}
return 0;
}