Submission #1254443

#	Time	Username	Problem	Language	Result	Execution time	Memory
1254443		hoa208	Art Exhibition (JOI18_art)	C++20	100 / 100	109 ms	12112 KiB

art

#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++)
#define FORD(i, b, a) for (int i = (b), _a = (a); i >= _a; i--)
#define pa pair<ll, ll>
#define fi first
#define se second
#define bit(mask, j) ((mask >> j) & 1)
#define t_test int t;cin >> t;while(t--)
const   ll mod = 1e9 + 7;
const   ll INF = 1e18;
inline  void adm(ll &x){if(x>=mod)x%=mod;else if(x<0)x+=mod;}
//--------------------------------------------------------------------

const ll N = 5e5 + 10;
ll s[N];
pa a[N];
void hbmt() {
    ll n;
    cin >> n;
    FOR(i, 1, n) {
        cin >> a[i].fi >> a[i].se;
    }
    sort(a + 1, a + n + 1);
    FOR(i, 1, n) {
        s[i] = s[i - 1] + a[i].se;
    }
    ll mn = INF;
    ll ans = 0;
    FOR(i, 1, n) {
        ll x = s[i] - a[i].fi;
        mn = min(s[i - 1] - a[i].fi, mn);
        ll res = x - mn;
        ans = max(res, ans);
    }
    cout << ans;
}

int main() {
    
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
    
    if(fopen("hbmt.inp", "r")) {
        freopen("hbmt.inp", "r", stdin);
        freopen("hbmt.out", "w", stdout);
    }
    
    // t_test 
    hbmt();
    return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:46:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         freopen("hbmt.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
art.cpp:47:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |         freopen("hbmt.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

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