Submission #738567

#	Time	Username	Problem	Language	Result	Execution time	Memory
738567		Toxtaq	Mutating DNA (IOI21_dna)	C++17	0 / 100	73 ms	3716 KiB

dna

#include<bits/stdc++.h>
using namespace std;
string a, b;
void init(string s1, string s2){
    a = s1;
    b = s2;
}
int get_distance(int x, int y){
    map<string, int>mp;
    int res = 0, cnt = 0;
    for(int i = x;i <= y;++i){
        string tempo = "";
        tempo += a[i];
        tempo += b[i];
        mp[tempo]++;
    }
    for(auto itr = mp.begin();itr != mp.end();++itr){
        string s = itr->first;
        string d = s;
        reverse(d.begin(), d.end());
        if(mp.count(d)){
            res += min(mp[d], mp[s]);
            mp[s] -= min(mp[d], mp[s]);
            mp[d] -= min(mp[d], mp[s]);
        }
        cnt += mp[s];
    }
    return cnt - 1 + res;
}
//int main()
//{
//    string a, b;
//    cin >> a >> b;
//    init(a, b);
//    int q;
//    cin >> q;
//    while(q--){
//        int l, r;
//        cin >> l >> r;
//        cout << get_distance(l, r) << '\n';
//    }
//}

• Subtask 1: 0 / 21
• Subtask 2: 0 / 22
• Subtask 3: 0 / 13
• Subtask 4: 0 / 28
• Subtask 5: 0 / 16