Submission #898383

#	Time	Username	Problem	Language	Result	Execution time	Memory
898383		abcvuitunggio	Fish (IOI08_fish)	C++17	0 / 100	3065 ms	30804 KiB

fish

#include <bits/stdc++.h>
using namespace std;
int n,k,m,res;
pair <int, int> f[500001];
map <int, int> pos,ch,ban,cnt;
int main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n >> k >> m;
    for (int i=0;i<n;i++){
        cin >> f[i].first >> f[i].second;
        if (!pos.count(f[i].second))
            pos[f[i].second]=f[i].first;
        pos[f[i].second]=min(pos[f[i].second],f[i].first);
    }
    sort(f,f+n);
    for (int i=n-1;i>=0;i--){
        if (ch.count(f[i].second))
            continue;
        for (int j=n-1;j>i;j--)
            if (f[j].first>=pos[f[i].second]*2)
                ban[f[j].second]=1;
        for (int j=0;j<i;j++)
            if (f[j].first*2<=f[i].first&&!ban.count(f[j].second))
                cnt[f[j].second]++;
        int x=1;
        for (auto [i,j]:cnt)
            x=x*(j+1)%m;
        res=(res+x)%m;
        ban.clear();
        cnt.clear();
        ch[f[i].second]=1;
    }
    cout << res;
}

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