UVA-11078(水题)

题意:

给一个序列,找两个整数a[i],a[j]使得a[i]-a[j]最大;

思路:

从前往后扫一遍;水题;

AC代码:

#include <bits/stdc++.h>
/*
#include <vector>
#include <iostream>
#include <queue>
#include <cmath>
#include <map>
#include <cstring>
#include <algorithm>
#include <cstdio>
*/
using namespace std;
#define For(i,j,n) for(int i=j;i<=n;i++)
#define Riep(n) for(int i=1;i<=n;i++)
#define Riop(n) for(int i=0;i<n;i++)
#define Rjep(n) for(int j=1;j<=n;j++)
#define Rjop(n) for(int j=0;j<n;j++)
#define mst(ss,b) memset(ss,b,sizeof(ss));
typedef  long long LL;
template<class T> void read(T&num) {
    char CH; bool F=false;
    for(CH=getchar();CH<'0'||CH>'9';F= CH=='-',CH=getchar());
    for(num=0;CH>='0'&&CH<='9';num=num*10+CH-'0',CH=getchar());
    F && (num=-num);
}
int stk[70], tp;
template<class T> inline void print(T p) {
    if(!p) { puts("0"); return; }
    while(p) stk[++ tp] = p%10, p/=10;
    while(tp) putchar(stk[tp--] + '0');
    putchar('
');
}

const LL mod=1e9+7;
const double PI=acos(-1.0);
const LL inf=1e18;
const int N=1e5+10;
const int maxn=1005;
const double eps=1e-10;



int n;
int a[N];

int main()
{

        int t;
        read(t);
        while(t--)
        {
            read(n);
            For(i,1,n)read(a[i]);
            int mmax=a[1],ans=-11000000;
            For(i,2,n)
            {
                ans=max(ans,mmax-a[i]);
                if(a[i]>mmax)mmax=a[i];
            }
            cout<<ans<<"
";
        }
        return 0;
}
原文地址:https://www.cnblogs.com/zhangchengc919/p/5662446.html