Submission #1007643

#	Time	Username	Problem	Language	Result	Execution time	Memory
1007643		doducanh	trapezoid (balkan11_trapezoid)	C++14	45 / 100	1074 ms	9908 KiB

trapezoid

#include <bits/stdc++.h>

using namespace std;
#define fi first
#define se second
const int maxn=1e5+7;
const int mod=30013;
const int maxx=1e9+7;
void cmax(pair<int,int>&a,pair<int,int>b)
{
    if(a.fi<b.fi)a=b;
    else{
        if(a.fi==b.fi&&a.fi!=0)a.se=(a.se+b.se)%mod;
    }
}
int id(int x,vector<pair<int,int>>tmp)
{
    return lower_bound(tmp.begin(),tmp.end(),make_pair(x,-maxx))-tmp.begin()+1;
}
struct BIT
{
private:
    int n;
    vector<pair<int,int>>t;
public:
    BIT(){}
    BIT(int n):n(n),t(n+7,make_pair(0,1)){}
    void up(int x,pair<int,int> val){
        for(;x<=n;x+=(x&(-x)))cmax(t[x],val);
    }
    pair<int,int>get(int x)
    {
        if(x<=0)return {0,1};
        pair<int,int>res={0,1};
        for(;x;x-=(x&(-x)))cmax(res,t[x]);
        return res;
    }
};
vector<int>a,b,c,d;
int n;
pair<int,int>ans[maxn];
main()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin>>n;
    a.resize(n+1);b.resize(n+1);
    c.resize(n+1);d.resize(n+1);
    vector<pair<int,int>>top;
    vector<pair<int,int>>bot;
    for(int i=1;i<=n;i++){
        cin>>a[i]>>b[i]>>c[i]>>d[i];
        top.push_back({a[i],i});
        top.push_back({b[i],i});
        bot.push_back({c[i],i});
        bot.push_back({d[i],i});
    }
    sort(begin(top),end(top));
    sort(begin(bot),end(bot));
    bot.erase(unique(begin(bot),end(bot)),end(bot));
    BIT t(2*bot.size()+7);
    for(auto[x,i]:top){
        if(x==a[i]){
            pair<int,int>tmp=t.get(id(c[i],bot)-1);
            ans[i]={tmp.fi+1,tmp.se};
        }
        else if(x==b[i]){
            t.up(id(d[i],bot),ans[i]);
        }
    }
    pair<int,int>res={0,0};
    for(int i=1;i<=n;i++){
        cmax(res,ans[i]);
    }
    cout<<res.fi<<" "<<res.se;
    return 0;
}

Compilation message (stderr)

trapezoid.cpp:42:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   42 | main()
      | ^~~~
trapezoid.cpp: In function 'int main()':
trapezoid.cpp:61:13: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   61 |     for(auto[x,i]:top){
      |             ^

• Subtask 1: 45 / 100