Submission #592147

#	Time	Username	Problem	Language	Result	Execution time	Memory
592147		jasmin	Roads (CEOI20_roads)	C++14	15 / 100	17 ms	1700 KiB

roads

#include<bits/stdc++.h>
using namespace std;
#define int long long

const int inf=1e18;

void subtask2(int n, vector<pair<pair<int,int>, pair<int,int> > >& p, vector<pair<pair<int,int>, pair<int,int> > >& old){
    auto compare=[&](int i, int j){
        auto a=p[i];
        auto b=p[j];
        if(a.first<b.first) return true;
        else if(a.first>b.first) return false;
        else{
            if(a.second<b.second) return true;
            return false;
        }
    };
    vector<int> sorted(n);
    iota(sorted.begin(), sorted.end(), 0);
    sort(sorted.begin(), sorted.end(), compare);
    pair<int,int> last={-inf, -inf};
    for(int i=0; i<n; i++){
        auto a=old[sorted[i]].first;
        auto b=old[sorted[i]].second;

        if(last.first!=-inf){
            cout << last.first << " " << last.second << " " << a.first << " " << a.second << "\n";
        }
        last=b;
    }
}

int length(pair<int,int> a, pair<int,int> b){
    int x1=abs(a.first-b.first);
    int x2=abs(a.second-b.second);
    int square=x1*x1 + x2*x2;

    int l=0; int r=square;
    int ans=0;
    while(l<=r){
        int m=l+(r-l)/2;
        if(m*m<=square){
            ans=m;
            l=m+1;
        }
        else{
            r=m-1;
        }
    }
    return ans;
}

signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n;
    cin >> n;
    vector<pair<pair<int,int>, pair<int,int> > >p(n);
    bool s2=true;
    for(int i=0; i<n; i++){
        cin >> p[i].first.first >> p[i].first.second;
        cin >> p[i].second.first >> p[i].second.second;
        if(p[i].first>p[i].second){
            swap(p[i].first, p[i].second);
        }

        if(p[i].first.first!=p[i].second.first) s2=false;
    }

    if(s2){
        subtask2(n, p, p);
        return 0;
    }

    vector<pair<pair<int,int>, pair<int,int> > >p2=p;
    for(int i=0; i<n; i++){
        pair<int,int> a=p[i].first;
        pair<int,int> b=p[i].second;

        int l=length(a, b);
        pair<int,int> neu;
        neu.first=a.first;
        neu.second=a.second+l;

        p2[i].second=neu;
        if(p2[i].first>p2[i].second){
            swap(p2[i].first, p2[i].second);
        }
    }
    subtask2(n, p2, p);
}

• Subtask 1: 0 / 0
• Subtask 2: 15 / 15
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 15
• Subtask 6: 0 / 40