Submission #1294308

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294308		eyadooz	Bliskost (COI23_bliskost)	C++20	100 / 100	105 ms	5812 KiB

Main

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

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define pb push_back
#define all(x) (x).begin(), (x).end()
#define sz(x) (int) (x).size()
#define endl '\n'

int main()
{
    cin.tie(0) -> sync_with_stdio(0);

    int n, q;
    cin >> n >> q;
    string a, b;
    cin >> a >> b;
    ll ans=0, ans1=0;
    for(int i = 0;i < n;i++) 
    {
        if(i%2==0) ans+=a[i]-'a';
        else ans-=a[i]-'a';
        ans+=26;
        ans%=26;
    }
    for(int i = 0;i < n;i++) 
    {
        if(i%2==0) ans1+=b[i]-'a';
        else ans1-=b[i]-'a';
        ans1+=26;
        ans1%=26;
    }
    cout << (ans==ans1?"da\n":"ne\n");
    while(q--) 
    {
        int i;
        char x;
        cin >> i >> x;
        i--;
        if(i%2==0) ans+=x-a[i];
        else ans-=x-a[i];
        a[i]=x;
        ans+=26;
        ans%=26;
        cout << (ans==ans1?"da\n":"ne\n");
    }
}
    

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 12 / 12
• Subtask 5: 17 / 17
• Subtask 6: 43 / 43