Submission #954521

#	Time	Username	Problem	Language	Result	Execution time	Memory
954521		becaido	Bliskost (COI23_bliskost)	C++17	100 / 100	128 ms	16120 KiB

Main

#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx,popcnt,sse4,abm")
#include <bits/stdc++.h>
using namespace std;

#ifdef WAIMAI
#define debug(HEHE...) cout << "[" << #HEHE << "] : ", dout(HEHE)
void dout() {cout << '\n';}
template<typename T, typename...U>
void dout(T t, U...u) {cout << t << (sizeof...(u) ? ", " : ""), dout(u...);}
#else
#define debug(...) 7122
#endif

#define ll long long
#define Waimai ios::sync_with_stdio(false), cin.tie(0)
#define FOR(x,a,b) for (int x = a, I = b; x <= I; x++)
#define pb emplace_back
#define F first
#define S second

const int SIZE = 1e6 + 5;

int n, q;
ll sum;
string a, b;

int cal(int i) {
    return ((i & 1) ? b[i] - a[i] : a[i] - b[i]);
}

void solve() {
    cin >> n >> q >> a >> b;
    a = " " + a;
    b = " " + b;
    FOR (i, 1, n) sum += cal(i);
    cout << (sum % 26 == 0 ? "da\n" : "ne\n");
    while (q--) {
        int p;
        char c;
        cin >> p >> c;
        sum -= cal(p);
        a[p] = c;
        sum += cal(p);
        cout << (sum % 26 == 0 ? "da\n" : "ne\n");
    }
}

int main() {
    Waimai;
    solve();
}

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