제출 #1108367

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1108367		hungnt	Art Exhibition (JOI18_art)	C++14	100 / 100	138 ms	8276 KiB

art

#include<bits/stdc++.h>
#define BIT(x, k) (((x) >> (k)) & 1)
#define on(x, k) ((x) ^ (1ll << (k)))
#define pii pair<int, int>
#define fi first
#define se second
#define all(x) x.begin(), x.end()
#define ll long long

using namespace std;

const int N = 5e5 + 5;

int n;
pair<ll, ll> a[N];

void process()
{
    cin >> n;
    for(int i = 1; i <= n; i++)
        cin >> a[i].fi >> a[i].se;
    sort(a + 1, a + n + 1);
    ll ans = 0, mx = -1e15;
    for(int i = 1; i <= n; i++)
    {
        a[i].se += a[i - 1].se;
        mx = max(mx, a[i].fi - a[i - 1].se);
        ans = max(ans, a[i].se - a[i].fi + mx);
    }
    cout << ans;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
    #define TASK "TASK"
    if (fopen(TASK".INP", "r"))
    {
        freopen(TASK".INP", "r", stdin);
        freopen(TASK".OUT", "w", stdout);
    }
    process();
    cerr << "\nTime elapsed: " << 1.0 * clock() / CLOCKS_PER_SEC << "s";
}

컴파일 시 표준 에러 (stderr) 메시지

art.cpp: In function 'int main()':
art.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen(TASK".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:41:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |         freopen(TASK".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 50 / 50