Submission #241099

#	Time	Username	Problem	Language	Result	Execution time	Memory
241099		aggu_01000101	Coin Collecting (JOI19_ho_t4)	C++14	0 / 100	5 ms	384 KiB

joi2019_ho_t4

    #include <bits/stdc++.h>
    #define int long long
    #define INF 100000000
    using namespace std;
    int n;
    int calcans(vector<int> &a, vector<int> &b){
        int cost = 0;
        for(int i = n;i>=1;i--){
            if(a.size() < b.size()) swap(a, b);
            int costa = INF, costb = INF, costc = INF;
            int bestcost = INF;
            //both from a
            if(a.size() >= 2){
                costa = min(costa, abs(i - a[a.size()-1]) + abs(i - a[a.size()-2]) + 1);
                bestcost = min(bestcost, costa);
            }
            //both from b
            if(b.size() >= 2){
                costb = min(costb, abs(i - b[b.size()-1]) + abs(i - b[b.size()-2]) + 1);
                bestcost = min(bestcost, costb);
            }
            //one from each
            if(a.size() && b.size()){
                costc = min(costc, abs(i - a[a.size()-1]) + abs(i - b[b.size()-1]));
                bestcost = min(bestcost, costc);
            }
            if(a.size()==b.size()){
                if(costc==bestcost){
                    a.pop_back();
                    b.pop_back();
                }
                else if(costb==bestcost){
                    b.pop_back();
                    b.pop_back();
                }
                else{
                    a.pop_back();
                    a.pop_back();
                }
            }
            else{
                if(costa==bestcost){
                    a.pop_back();
                    a.pop_back();
                }
                else if(costc==bestcost){
                    b.pop_back();
                    a.pop_back();
                }
                else{
                    b.pop_back();
                    b.pop_back();
                }
            }
            cost+=bestcost;
        }
        return cost;
    }
    signed main(){
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cin>>n;
        int cost = 0;
        vector<int> v[2];
        for(int i = 0;i<(2*n);i++){
            int x, y;
            cin>>x>>y;
            if(y<=1){
                cost+=(1 - y);
                y = 1;
            }
            else{
                cost+=(y - 2);
                y = 2;
            }
            if(x<1){
                cost += (1 - x);
                x = 1;
            }
            if(x>n){
                cost += (x - n);
                x = n;
            }
            //cout<<i<<" "<<x<<" "<<y<<" "<<cost<<endl;
            v[y-1].push_back(x);
        }
        sort(v[0].begin(), v[0].end());
        sort(v[1].begin(), v[1].end());
        cost+=calcans(v[0], v[1]);
        cout<<cost<<endl;

    }
    /*

    5
    1000000000 1000000000
    -1000000000 1000000000
    -1000000000 -1000000000
    1000000000 -1000000000
    -1 -5
    -2 2
    2 8
    4 7
    -2 5
    7 3
     */

• Subtask 1: 0 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63