BZOJ2091: [Poi2010]The Minima Game

【代码】

#include <iostream>
#include <cstdio>
#include <algorithm>
#define N 1000005
#define mod 1000000
#define INF 0x7fffffff
using namespace std;
typedef long long ll;

int read()
{
int x=0,f=1;char ch=getchar();
while(!isdigit(ch)){if(ch=='-') f=-1;ch=getchar();}
while(isdigit(ch)){x=(x<<1)+(x<<3)+ch-'0';ch=getchar();}
return x*f;
}

int n;
int a
,f
;

int main()
{
n=read();
for(int i=1;i<=n;i++) a[i]=read();
sort(a+1,a+1+n);
for(int i=1;i<=n;i++) f[i]=max(f[i-1],a[i]-f[i-1]);
printf("%d\n",f
);
return 0;
}