Submission #1270969

#	Time	Username	Problem	Language	Result	Execution time	Memory
1270969		nthvn	Art Exhibition (JOI18_art)	C++20	100 / 100	129 ms	19788 KiB

art

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

#define fi first
#define se second
#define pii pair<int,int>
#define ll long long
#define pb(x) push_back(x)
#define sz(x) (int)x.size()
#define all(x) x.begin(), x.end()
#define pll pair<ll,ll>
const int N = 5e5+5;
int n;
pll a[N];
ll ps[N], f[N], mn[N];

signed main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL);
    if(fopen("ART.INP", "r")){
        freopen("ART.INP", "r", stdin);
        freopen("ART.OUT", "w", stdout);
    }
    cin>>n;
    for(int i=1;i<=n;i++) cin>>a[i].fi>>a[i].se;
    sort(a+1,a+n+1);
    for(int i=1;i<=n;i++) ps[i] = ps[i-1]+ a[i].se;
    f[0] = -a[1].fi;
    mn[0]= f[0];
    for(int i=1;i<n;i++) {
        f[i] = ps[i] - a[i+1].fi;
        mn[i] = min(mn[i-1], f[i]);
    }
    ll ans =0;
    for(int r=1;r<=n;r++){
        ans = max(ans, ps[r]-a[r].fi-mn[r-1]);
    }
    cout<<ans;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.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("ART.INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
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("ART.OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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