XTU1238 线段树

  1 #include <iostream>
  2 #include <algorithm>
  3 #include <cstring>
  4 #include <cstdio>
  5 #include <string>
  6 #include <vector>
  7 #include <queue>
  8 
  9 using namespace std;
 10 
 11 typedef long long LL;
 12 const int INF = 2e9;
 13 LL max_ans, min_ans;
 14 
 15 struct segtree
 16 {
 17     static const int TN = 2e5 + 10;
 18     struct node
 19     {
 20         LL maxv, minv, add;
 21     } tree[TN<<2];
 22 
 23     void pushUp(int k)
 24     {
 25         tree[k].maxv = max(tree[k<<1].maxv, tree[k<<1|1].maxv);
 26         tree[k].minv = min(tree[k<<1].minv, tree[k<<1|1].minv);
 27     }
 28 
 29     void pushDown(int k)
 30     {
 31         if(tree[k].add != 0)
 32         {
 33             tree[k<<1].add += tree[k].add;
 34             tree[k<<1].minv += tree[k].add;
 35             tree[k<<1].maxv += tree[k].add;
 36 
 37             tree[k<<1|1].add += tree[k].add;
 38             tree[k<<1|1].minv += tree[k].add;
 39             tree[k<<1|1].maxv += tree[k].add;
 40 
 41             tree[k].add = 0;
 42         }
 43 
 44         tree[k<<1].maxv = min(tree[k<<1].maxv, tree[k].maxv);
 45         tree[k<<1].maxv = max(tree[k<<1].maxv, tree[k].minv);
 46         tree[k<<1].minv = max(tree[k<<1].minv, tree[k].minv);
 47         tree[k<<1].minv = min(tree[k<<1].minv, tree[k].maxv);
 48 
 49         tree[k<<1|1].maxv = min(tree[k<<1|1].maxv, tree[k].maxv);
 50         tree[k<<1|1].maxv = max(tree[k<<1|1].maxv, tree[k].minv);
 51         tree[k<<1|1].minv = max(tree[k<<1|1].minv, tree[k].minv);
 52         tree[k<<1|1].minv = min(tree[k<<1|1].minv, tree[k].maxv);
 53     }
 54 
 55     void build(int l, int r, int k)
 56     {
 57         tree[k].add = 0;
 58         if(l == r)
 59         {
 60             scanf("%I64d", &tree[k].maxv);
 61             tree[k].minv = tree[k].maxv;
 62             return ;
 63         }
 64         int mid = (l+r)>>1;
 65         build(l, mid, k<<1);
 66         build(mid+1, r, k<<1|1);
 67         pushUp(k);
 68     }
 69 
 70     void update(int l, int r, int k, int a, int b, int op, LL c)
 71     {
 72         if(a > r || b < l) return ;
 73         if(a <= l && r <= b)
 74         {
 75             if(op == 1)
 76             {
 77                 tree[k].add += c;
 78                 tree[k].maxv += c;
 79                 tree[k].minv += c;
 80             }
 81             else if(op == 2)
 82             {
 83                 tree[k].maxv = min(tree[k].maxv, c);
 84                 tree[k].minv = min(tree[k].minv, c);
 85             }
 86             else if(op == 3)
 87             {
 88                 tree[k].maxv = max(tree[k].maxv, c);
 89                 tree[k].minv = max(tree[k].minv, c);
 90             }
 91             return ;
 92         }
 93         pushDown(k);
 94         int mid = (l+r)>>1;
 95         if(a <= mid)
 96             update(l, mid, k<<1, a, b, op, c);
 97         if(b > mid)
 98             update(mid+1, r, k<<1|1, a, b, op, c);
 99         pushUp(k);
100     }
101 
102     void query(int l, int r, int k, int a, int b)
103     {
104         if(a > r || b < l) return ;
105         if(a <= l && r <= b)
106         {
107             max_ans = max(max_ans, tree[k].maxv);
108             min_ans = min(min_ans, tree[k].minv);
109             return ;
110         }
111         pushDown(k);
112         int mid = (l+r)>>1;
113         if(a <= mid)
114             query(l, mid, k<<1, a, b);
115         if(b > mid)
116             query(mid+1, r, k<<1|1, a, b);
117         pushUp(k);
118     }
119 } T;
120 
121 int work()
122 {
123     int n, q, op, l, r; LL c;
124     scanf("%d %d", &n, &q);
125     T.build(1, n, 1);
126     while(q--)
127     {
128         scanf("%d %d %d", &op, &l, &r);
129         if(op != 4)
130         {
131             scanf("%I64d", &c);
132             T.update(1, n, 1, l, r, op, c);
133         }
134         else
135         {
136             max_ans = -INF;
137             min_ans =  INF;
138             T.query(1, n, 1, l, r);
139             printf("%I64d %I64d\n", min_ans, max_ans);
140         }
141     }
142     return 0;
143 }
144 
145 int main()
146 {
147     int T;
148 
149     scanf("%d", &T);
150 
151     while(T --)
152         work();
153 
154     return 0;
155 }