Submission #1125102

#	Time	Username	Problem	Language	Result	Execution time	Memory
1125102		peacebringer1667	Bliskost (COI23_bliskost)	C++17	100 / 100	206 ms	11772 KiB

Main

#include<bits/stdc++.h>
#define ll long long
#define ldb long double
#define db double
#define fi first
#define se second
#define sza(a) (int)a.size()
#define pir pair<int,int>
#define pirll pair<ll,ll>
using namespace std;
const int maxn = 1e6 + 5;
const int N = 26;

template <class t1,class t2> inline void maxi(t1 &x,t2 y){if (x < y) x = y;}
template <class t1,class t2> inline void mini(t1 &x,t2 y){if (x > y) x = y;}

inline void print_(bool x){
	if (x) cout << "da" << "\n";
	if (!x) cout << "ne" << "\n";
}

int a[maxn],b[maxn];


void input(int n,int q,int &ca,int &cb){
	ca = cb = 0;
	
	string A,B;
	cin >> A >> B;
	
	for (int i = 1 ; i <= n ; i++){
		a[i] = A[i - 1] - 97;
		b[i] = B[i - 1] - 97;
		
		ca = (ca + ((i % 2) ? a[i] : -a[i]) + N*N) % N;
		cb = (cb + ((i % 2) ? b[i] : -b[i]) + N*N) % N;
	}
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);cout.tie(0);
	
	int n,q,ca,cb;
	cin >> n >> q;
	input(n,q,ca,cb);
	
	print_(ca == cb);
	
	while (q--){
		int p;char ch;
		cin >> p >> ch;
		int c = ch - 97;
		
		ca = (ca + ((p % 2) ? (-a[p]) : a[p]) + N*N) % N;
		ca = (ca + ((p % 2) ? c : (-c)) + N*N) % N;
		
		a[p] = c;
		print_(ca == cb);
	}

	return 0;
}

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