Submission #850525

#	Time	Username	Problem	Language	Result	Execution time	Memory
850525		oscar1f	Monochrome Points (JOI20_monochrome)	C++17	35 / 100	2028 ms	16852 KiB

monochrome

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

#define int long long

int nbVal;
vector<int> initType;
string valDeb;

int verif(int bla1,int noir1,int bla2,int noir2) {
    if (bla1>bla2) {
        return verif(bla2,noir2,bla1,noir1);
    }
    if (bla1>noir1) {
        return verif(noir1,bla1,noir2,bla2);
    }
    if (bla2>bla1 and bla2<noir1) {
        if (noir2>noir1 or noir2<bla1) {
            return 1;
        }
        else {
            return 0;
        }
    }
    else {
        if (noir2>bla1 and noir2<noir1) {
            return 1;
        }
        else {
            return 0;
        }
    }
}

int compt(vector<int> listeBla,vector<int> listeNoir) {
    int nbInter=0,temp,mini,maxi;
    for (int i=0;i<nbVal;i++) {
        mini=min(listeBla[i],listeNoir[i]);
        maxi=max(listeBla[i],listeNoir[i]);
        temp=min(maxi-mini-1,2*nbVal-maxi-1+mini);
        //cout<<listeBla[i]<<" "<<listeNoir[i]<<" "<<temp<<" ";
        nbInter+=temp;
    }
    return nbInter/2;
    /*for (int i=0;i<nbVal;i++) {
        for (int j=i+1;j<nbVal;j++) {
            nbInter+=verif(listeBla[i],listeNoir[i],listeBla[j],listeNoir[j]);
        }
    }
    return nbInter;*/
}

int calc(vector<int> typeSom) {
    int rep=0;
    vector<int> listeBla,listeNoir;
    for (int i=0;i<2*nbVal;i++) {
        if (typeSom[i]==0) {
            listeBla.push_back(i);
        }
        else {
            listeNoir.push_back(i);
        }
    }
    vector<int> ordreNoir;
    for (int i=0;i<nbVal;i++) {
        ordreNoir.clear();
        for (int j=0;j<nbVal;j++) {
            ordreNoir.push_back(listeNoir[(i+j)%nbVal]);
        }
        int temp=compt(listeBla,ordreNoir);
        //cout<<" = "<<temp<<endl;
        rep=max(rep,temp);
    }
    //cout<<endl;
    return rep;
}

signed main() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>nbVal;
    cin>>valDeb;
    for (int i=0;i<2*nbVal;i++) {
        if (valDeb[i]=='W') {
            initType.push_back(0);
        }
        else {
            initType.push_back(1);
        }
    }
    cout<<calc(initType)<<endl;
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 21 / 21
• Subtask 3: 10 / 10
• Subtask 4: 0 / 65