P1969-积木大赛 

 1 #include <bits/stdc++.h>
 2 #define _for(i,a,b) for(int i = (a);i < b;i ++)
 3 #define _rep(i,a,b) for(int i = (a);i > b;i --)
 4 typedef long long ll;
 5 using namespace std;
 6 inline ll read()
 7 {
 8     ll ans = 0;
 9     char ch = getchar(), last = ' ';
10     while(!isdigit(ch)) last = ch, ch = getchar();
11     while(isdigit(ch)) ans = (ans << 1) + (ans << 3) + ch - '0', ch = getchar();
12     if(last == '-') ans = -ans;
13     return ans;
14 }
15 inline void write(ll x)
16 {
17     if(x < 0) x = -x, putchar('-');
18     if(x >= 10) write(x / 10);
19     putchar(x % 10 + '0');
20 }
21 
22 int n;
23 int a,b;
24 int main()
25 {
26     n = read();
27     int rnt = 0;
28     _for(i,0,n)
29     {
30         a = read();
31         if(a>b)
32             rnt += a-b;
33         b = a;
34     }
35     write(rnt);
36     
37     
38     return 0;
39 }

 

posted @ 2019-08-19 10:10  Asurudo  阅读(143)  评论(0)    收藏  举报