Submission #898418

#	Time	Username	Problem	Language	Result	Execution time	Memory
898418		abcvuitunggio	Fish (IOI08_fish)	C++17	56 / 100	3066 ms	17748 KiB

fish

#include <bits/stdc++.h>
#define int long long
using namespace std;
int n,k,m,res,ch[500001],pos[500001],ban[500001],cnt[500001];
pair <int, int> f[500001];
int32_t main(){
    ios_base::sync_with_stdio(NULL);cin.tie(nullptr);
    cin >> n >> k >> m;
    for (int i=1;i<=n;i++){
        cin >> f[i].first >> f[i].second;
        if (!pos[f[i].second])
            pos[f[i].second]=f[i].first;
        pos[f[i].second]=min(pos[f[i].second],f[i].first);
    }
    sort(f+1,f+n+1);
    for (int i=n;i;i--){
        if (ch[f[i].second])
            continue;
        for (int j=n;j>i;j--)
            if (f[j].first>=pos[f[i].second]*2)
                ban[f[j].second]=1;
        for (int j=1;j<i;j++)
            if (f[j].first*2<=f[i].first)
                cnt[f[j].second]++;
        int x=1;
        ban[f[i].second]=1;
        for (int i=1;i<=k;i++)
            if (!ban[i])
                x=x*(cnt[i]+1)%m;
        res=(res+x*(cnt[f[i].second]+1))%m;
        ch[f[i].second]=i;
        int l=0;
        for (int j=1;j<=n;j++)
            if (f[j].first*2>f[i].first&&f[j].second==f[i].second){
                l=f[j].first;
                break;
            }
        int y=1;
        for (int j=i+1;j<=n;j++)
            if (f[j].first>=pos[f[i].second]*2&&l*2>f[j].first&&ch[f[j].second]==j)
                y=y*(cnt[f[j].second]+1)%m;
        res=(res+x*(y+m-1))%m;
        for (int j=1;j<=k;j++)
            ban[j]=cnt[j]=0;
    }
    cout << res;
}

• Subtask 1: 4 / 4
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• Subtask 19: 0 / 5