Submission #1109978

#	Time	Username	Problem	Language	Result	Execution time	Memory
1109978		whyalwaysmezzz	Art Exhibition (JOI18_art)	C++14	100 / 100	137 ms	21064 KiB

art

#include <bits/stdc++.h>
#ifdef LOCAL
#define TASK "test"
#else
#define TASK "test"
#endif
using namespace std;
 
#define int long long
 
const int N = 5e5 + 5;
 
int n;
pair<int, int> a[N];
 
signed main() {
    if (fopen(TASK".inp", "r")) {
        freopen(TASK".inp", "r", stdin);
        freopen(TASK".out", "w", stdout);
    }
    if (fopen(TASK".err", "r")) {
        freopen(TASK".err", "w", stderr);
    }
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n;
    for (int i = 1; i <= n; ++i) {
        cin >> a[i].first >> a[i].second;
    }
    sort(a + 1, a + n + 1);
    int sum = 0, best = -a[1].first, res = 0;
    for (int i = 1; i <= n; ++i) {
        sum += a[i - 1].first - a[i].first + a[i].second;
        res = max(res, sum - best);
        best = min(best, sum + a[i].first - a[i + 1].first);
    }
    cout << res;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:18:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |         freopen(TASK".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:19:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |         freopen(TASK".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen(TASK".err", "w", stderr);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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