Submission #502078

#	Time	Username	Problem	Language	Result	Execution time	Memory
502078		Marduk	Cards (LMIO19_korteles)	C++14	0 / 100	1079 ms	39120 KiB

korteles

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

#define X first
#define Y second

int n,sol;

map<pair<string,int>,int> m; //prefix, up/down, id
map<pair<string,string>,int> ob;

map<pair<string,int>,int> mf; //prefix, up/down, id
map<pair<string,string>,int> obf;

map<pair<string,string>,int> isti;

pair<string,string> Flip(string x, string y){
    return {string()+y[0]+x[0], string()+y[1]+x[1]};
}

int main(){
    cin >> n;

    for(int i = 0;i<n;i++){
        string a,b; cin >> a >> b;

        sol+=m[{a,1}]+m[{b,0}]-ob[{b,a}];
        m[{a,0}]++;
        m[{b,1}]++;
        ob[{a,b}]++;

        a = Flip(a,b).X; b = Flip(a,b).Y;

        sol+=mf[{a,1}]+mf[{b,0}]-obf[{b,a}];
        mf[{a,0}]++;
        mf[{b,1}]++;
        obf[{a,b}]++;

        sol-=isti[{a,b}];
        isti[{a,b}]++;
    }

    cout << sol;
}

• Subtask 1: 0 / 16
• Subtask 2: 0 / 20
• Subtask 3: 0 / 20
• Subtask 4: 0 / 19
• Subtask 5: 0 / 25