제출 #1208042

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1208042		quangminh412	Advertisement 2 (JOI23_ho_t2)	C++17	100 / 100	107 ms	4588 KiB

Main

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

/*
  Ben Watson
  Handle codeforces : quangminh98

  Mua Code nhu mua Florentino !!
*/

#define ll long long

const string name = "test";

void solve();
signed main()
{
    if (fopen((name + ".inp").c_str(), "r"))
    {
        freopen((name + ".inp").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    solve();

    return 0;
}

// main program
bool cmp(pair<int, int> a, pair<int, int> b)
{
    if (a.first == b.first)
        return a.second > b.second;
    return a.first < b.first;
}

void solve()
{
    int n; cin >> n;
    vector<pair<int, int>> books;
    for (int i = 0; i < n; i++)
    {
        int x, e; cin >> x >> e;
        books.push_back({x - e, x + e});
    }

    sort(books.begin(), books.end(), cmp);
    int res = 0, mx = -1;
    for (pair<int, int> it : books)
        if (mx < it.second)
        {
            mx = it.second;
            res++;
        }

    cout << res << '\n';
}

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'int main()':
Main.cpp:20:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |         freopen((name + ".inp").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:21:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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