Submission #1239012

#	Time	Username	Problem	Language	Result	Execution time	Memory
1239012		SalihSahin	Comparing Plants (IOI20_plants)	C++20	0 / 100	4094 ms	2632 KiB

plants

#include "bits/stdc++.h"
#include "plants.h"
#define pb push_back
using namespace std;


vector<int> mnsg, mxsg;

void init(int k, vector<int> r) {
    int n = r.size();
    for(int i = 0; i < n; i++){
        r[i] = (k - 1) - r[i];
    }

    vector<int> mns(n, n-1);
    for(int cur = 0; cur < n; cur++){
        vector<int> now = r, candnow(n), act(n, 1);
        set<int> cand;
        bool cand_cur = 0;

        for(int i = 0; i < n; i++){
            if(!now[i]){
                cand.insert(i);
                candnow[i] = true;
            }
        }

        // candidate olana kadar sagımda alabilecegim ilk elemanı al upd at onu deaktive et
        // eger ben candidate isem solda alabilecegim ilk elemanı al upd at onu deaktive et öyle ki solum boşalana ve kendimi alana kadar
        int cnt = 0;

        while(true){
            int opbas = 0;

            if(candnow[cur] == false){
                if(!cand.size()){
                    cout<<cur<<" ve "<<cnt<<" bakarken patladık "<<endl;
                    abort();
                }
                auto nxt = cand.lower_bound(cur);
                if(nxt == cand.end()){
                    nxt = cand.begin();
                }
                opbas = *nxt;
            }
            else{
                int lst = cur;

                for(int j = cur-1; j > cur-n; j--){
                    if(candnow[(j + n)%n] && lst - j < k){
                        lst = j;
                    }
                }

                opbas = (lst + n)%n;
            }

            if(opbas == cur) break;

            cnt++;
            cand.erase(cand.find(opbas));
            candnow[opbas] = 0;
            act[opbas] = 0;

            for(int i = opbas-1; i > opbas-k; i--){
                if(!act[(i+n)%n]) continue;
                if(candnow[(i+n)%n]) continue;

                now[(i + n)%n]--;
                if(!now[(i + n)%n]){
                    cand.insert((i + n)%n);
                    candnow[(i + n)%n] = 1;
                }
            }
        }

        mns[cur] = cnt;
    }
    mnsg = mns;

    for(int i = 0; i < n; i++){
        r[i] = (k - 1) - r[i];
    }

    vector<int> mxs(n, n-1);
    for(int cur = 0; cur < n; cur++){
        vector<int> now = r, candnow(n), act(n, 1);
        set<int> cand;
        bool cand_cur = 0;

        for(int i = 0; i < n; i++){
            if(!now[i]){
                cand.insert(i);
                candnow[i] = true;
            }
        }

        // candidate olana kadar sagımda alabilecegim ilk elemanı al upd at onu deaktive et
        // eger ben candidate isem solda alabilecegim ilk elemanı al upd at onu deaktive et öyle ki solum boşalana ve kendimi alana kadar
        int cnt = 0;

        while(true){
            int opbas = 0;

            if(candnow[cur] == false){
                if(!cand.size()){
                    cout<<cur<<" ve "<<cnt<<" bakarken patladık "<<endl;
                    abort();
                }
                auto nxt = cand.lower_bound(cur);
                if(nxt == cand.end()){
                    nxt = cand.begin();
                }
                opbas = *nxt;
            }
            else{
                int lst = cur;

                for(int j = cur-1; j > cur-n; j--){
                    if(candnow[(j + n)%n] && lst - j < k){
                        lst = j;
                    }
                }

                opbas = (lst + n)%n;
            }

            if(opbas == cur) break;

            cnt++;
            cand.erase(cand.find(opbas));
            candnow[opbas] = 0;
            act[opbas] = 0;

            for(int i = opbas-1; i > opbas-k; i--){
                if(!act[(i+n)%n]) continue;
                if(candnow[(i+n)%n]) continue;

                now[(i + n)%n]--;
                if(!now[(i + n)%n]){
                    cand.insert((i + n)%n);
                    candnow[(i + n)%n] = 1;
                }
            }
        }

        mxs[cur] = cnt;
    }
    mxsg = mxs;

    for(int i = 0; i < n; i++){
        mxsg[i] = n - mxsg[i] - 1;
        //cout<<i<<" : "<<mnsg[i]<<" "<<mxsg[i]<<endl;
    }

    return;
}

int intersect(pair<int, int> p1, pair<int, int> p2){
    if(p1.first > p2.second || p2.first > p1.second) return 0;
    else return 1;
}

int compare_plants(int x, int y){
    if(intersect({mnsg[x], mxsg[x]}, {mnsg[y], mxsg[y]})) return 0;
    if(mnsg[x] > mnsg[y]) return 1;
    else return -1;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25