Submission #1019252

#	Time	Username	Problem	Language	Result	Execution time	Memory
1019252		MarwenElarbi	Bliskost (COI23_bliskost)	C++17	100 / 100	138 ms	20452 KiB

Main

#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#define pb push_back
#define se second
#define fi first
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
const int nax=1e5+5;
int main() {
    optimise;
    int n,q;
    cin>>n>>q;
    string a,b;
    cin>>a>>b;
    int tab[n];
    for (int i = 0; i < n; ++i)
    {
        int cnt = (i ? tab[i-1] : 0);
        tab[i]=(b[i]-a[i]-cnt+26)%26;
    }
    cout << (tab[n-1]==0 ? "da" : "ne")<<'\n';
    for (int i = 0; i < q; ++i)
    {
        int x;
        char y;
        cin>>x>>y;
        x--;
        int cnt=y-a[x];
        a[x]=y;
        if((n-x)%2){
            tab[n-1]-=cnt;
            tab[n-1]+=26;
            tab[n-1]%=26;
        }else{
            tab[n-1]+=cnt;
            tab[n-1]+=26;
            tab[n-1]%=26;
        }
        cout << (tab[n-1]==0 ? "da" : "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