cf Sereja and Array

http://codeforces.com/contest/315/problem/B

 1 #include <cstdio>
 2 #include <cstring>
 3 #include <iostream>
 4 #include <algorithm>
 5 #define maxn 200000
 6 using namespace std;
 7 
 8 int a[maxn],b[maxn],c,v,x;
 9 
10 int main()
11 {
12     int n,m;
13     cin>>n>>m;
14     for(int i=0; i<n; i++)
15     {
16         cin>>a[i];
17     }
18     int ans=0;
19     for(int i=0; i<m; i++)
20     {
21         cin>>c;
22         if(c==1)
23         {
24             cin>>v>>x;
25             a[v-1]=x-ans;
26         }
27         else if(c==2)
28         {
29             cin>>x;
30             ans+=x;
31         }
32         else if(c==3)
33         {
34             cin>>v;
35             cout<<a[v-1]+ans<<endl;
36         }
37     }
38     return 0;
39 }
View Code

 

posted @ 2014-04-14 20:49  null1019  阅读(107)  评论(0编辑  收藏  举报