제출 #1281273

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1281273		tunademayo	Advertisement 2 (JOI23_ho_t2)	C++20	10 / 100	565 ms	25460 KiB

Main

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

#define ll long long

const bool Multitest = 0;

const int N = 5e5 + 10;

struct Data
{
    int a, b;
}; Data a[N];

int n;

namespace sub1
{
    bool check()
    {
        for(int i = 1 ; i < n ; i++)
        {
            if(a[i].b != a[i + 1].b) return 0;
        }

        return 1;
    }

    set<int> s;

    void solve()
    {
        for(int i = 1 ; i <= n ; i++)
        {
            s.insert(a[i].a);
        }

        cout << s.size();
    }
}

void work()
{
    cin >> n;

    for(int i = 1 ; i <= n ; i++) cin >> a[i].a >> a[i].b;

    if(sub1::check())
    {
        sub1::solve();
    }
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);

    int q = 1;

    if(fopen("task.inp", "r"))
    {
        freopen("task.inp", "r", stdin);
        freopen("task.out", "w", stdout);
    }

    if(Multitest)   cin >> q;

    while(q--) work();
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:63:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   63 |         freopen("task.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:64:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         freopen("task.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 23
• Subtask 3: 0 / 36
• Subtask 4: 0 / 31