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;
const int N=5e5+10;
int n, m, mod, mx[N], cnt[N], f[N], vis[N], cnt2[N];
vector<int> v[N];
pair<int, int> a[N];
int32_t main(){
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cin >> n >> m >> mod;
for (int i=1; i<=n; ++i) cin >> a[i].first >> a[i].second;
sort(a+1, a+n+1);
for (int i=1; i<=n; ++i) mx[a[i].second]=i, ++cnt[a[i].second], f[a[i].second]=1;
for (int i=1; i<=n; ++i) if (a[i].first*2<=a[mx[a[i].second]].first) ++f[a[i].second];
int ans=0;
for (int i=n, j=n; i>=1; --i) if (mx[a[i].second]==i){
while (j && a[j].first*2>a[i].first){
--cnt[a[j].second];
--j;
}
{
int cur=1;
for (int k=1; k<=m; ++k) if (mx[k]<=i) cur=cur*(cnt[k]+1)%mod;
ans=(ans+cur)%mod;
}
for (int k:v[a[i].second]) vis[k]=0;
{
for (int k=1; k<=m; ++k) if (mx[k]<i){
if (f[k]>cnt[k]){
int j2=j;
while (j && a[j].first*2>a[mx[k]].first){
--cnt[a[j].second];
--j;
}
{
int cur=1;
for (int t=1; t<=m; ++t) if (mx[t]<=i){
if (t==a[i].second) cur=cur*cnt[t]%mod;
else if (t!=k) cur=cur*(cnt[t]+1)%mod;
}
ans=(ans+cur)%mod;
}
while (j!=j2){
++j;
++cnt[a[j].second];
}
}
}
}
}
cout << ans << '\n';
return 0;
}
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