Submission #51954

#	Time	Username	Problem	Language	Result	Execution time	Memory
51954		TadijaSebez	Art Exhibition (JOI18_art)	C++11	100 / 100	458 ms	237048 KiB

art

#include <stdio.h>
#include <algorithm>
using namespace std;
#define ll long long
const int N=500050;
ll a[N],b[N],c[N],d[N];
int id[N];
bool comp(int i, int j){ return c[i]<c[j];}
const ll inf=1e18;
ll max(ll a, ll b){ return a>b?a:b;}
int main()
{
	int n,i;
	scanf("%i",&n);
	for(i=1;i<=n;i++) scanf("%lld %lld",&c[i],&d[i]),id[i]=i;
	sort(id+1,id+1+n,comp);
	for(i=1;i<=n;i++) a[i]=c[id[i]],b[i]=b[i-1]+d[id[i]];
	ll best=-inf,sol=-inf;
	for(i=1;i<=n;i++)
	{
		best=max(best,a[i]-b[i-1]);
		sol=max(sol,best-a[i]+b[i]);
	}
	printf("%lld\n",sol);
	return 0;
}

Compilation message (stderr)

art.cpp: In function 'int main()':
art.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%i",&n);
  ~~~~~^~~~~~~~~
art.cpp:15:50: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(i=1;i<=n;i++) scanf("%lld %lld",&c[i],&d[i]),id[i]=i;
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~

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