제출 #1312745

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1312745		_Temirhan	Bliskost (COI23_bliskost)	C++20	28 / 100	9 ms	10708 KiB

Main

#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>  
#include <ext/pb_ds/assoc_container.hpp>

using namespace std;
using namespace __gnu_pbds;

#pragma GCC optimize("Ofast,unroll-loops,inline-functions,no-stack-protector,03")
#pragma GCC target ("sse,sse2,sse3,ssse3,sse4,popcnt,abm,avx2,mmx,fma,avx,tune=native")
#pragma clang loop vectorize(enable)
#pragma clang loop interleave(enable)

#define int long long
#define sz(x) (int)x.size()
#define F first
#define S second
#define pb push_back
#define nl '\n'
#define o_set tree<int, null_type, less_equal<int>, rb_tree_tag, tree_order_statistics_node_update>
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
typedef pair<int, int> pii;

void file( string s = "" )
{
    if( s.empty() )
        return;
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const int N = 2e5 + 2;
const int N1 = 1e6 + 2;
const int inf = 1e9 + 2;
const int INF = 1e18 + 2;
const int mod = 1e9 + 7;
int T = 1;

void solve()
{
    int n, q;
    string s, t;
    cin >>n >>q >>s >>t;
    int cur = 0;
    int dif[n];
    for( int i = 0; i < n; ++i )
    {
        cur = t[i] - s[i] - cur;
        dif[i] = (n & 1 == i & 1 ? -1 : 1) * (t[i] - s[i]);
    }
    cout <<(cur % 26 == 0 ? "da\n" : "ne\n");
    while( q-- )
    {
        int i;
        char c;
        cin >>i >>c;
        --i;
        s[i] = c;
        cur -= dif[i];
        dif[i] = (n & 1 == i & 1 ? -1 : 1) * (t[i] - s[i]);
        cur += dif[i];
        cout <<(cur % 26 == 0 ? "da\n" : "ne\n");
    }
}

signed main()
{
    file("");
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    // cin >>T;
    while( T-- )
        solve();
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void file(std::string)':
Main.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:28:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   28 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 8 / 8
• Subtask 3: 13 / 13
• Subtask 4: 0 / 12
• Subtask 5: 0 / 17
• Subtask 6: 0 / 43