107序列操作(后缀最大值)

 1 /**\
 2 记录操作1的最后一次出现的地方,(前面操作都没有用),
 3 然后对比他的下一次操作二的最大值(这里处理一个后缀最大值即可)
 4 \**/
 5 #include <bits/stdc++.h>
 6 using namespace std;
 7 #define fi first
 8 #define se second
 9 #define go continue
10 #define int long long
11 #define PII pair<int, int>
12 #define sf(x) scanf("%lld",&x)
13 #define ytz int _; sf(_); while(_--)
14 #define fory(i,a,b) for(int i = a; i <= b; ++i)
15 #define forl(i,a,b) for(int i = a; i >= b; --i)
16 #define debug(a) cout << #a << " = " << a <<endl;
17 const int N = 1e6 + 9;
18 int n, q;
19 int last[N], val[N], s[N], a[N];
20 signed main()
21 {
22     int cmp = -1e18;
23     sf(n), sf(q);
24     fory(i, 1, n) sf(a[i]), val[i] = a[i];
25     fory(i, 1, q)
26     {
27         int op;
28         sf(op);
29         if(op == 1)
30         {
31             int x, y;
32             sf(x), sf(y);
33             last[x] = i;
34             val[x] = y;
35         }
36         else
37         {
38             sf(s[i]);
39             cmp = max(cmp,s[i]);
40         }
41     }
42     for(int i = q; i >= 1; --i) s[i] = max(s[i], s[i + 1]);
43 
44     fory(i, 1, n)
45     {
46         if(last[i] == 0)
47         {
48             a[i] = max(a[i], cmp);
49         }
50         else
51         {
52             a[i] = max(val[i], s[last[i] + 1]);
53         }
54     }
55     fory(i, 1, n) printf("%lld ", a[i]);
56     return 0;
57 }

标签：后缀,max,最大值,long,int,fory,107,define
来源： https://www.cnblogs.com/-ytz/p/15965458.html