Codeforces 482B Interesting Array（线段树）

 1 #include <bits/stdc++.h>
 2 
 3 using namespace std;
 4 
 5 #define rep(i, a, b) for (int i(a); i <= (b); ++i)
 6 #define lson i << 1, L, mid
 7 #define rson i << 1 | 1, mid + 1, R
 8 
 9 const int N = 100010;
10 
11 struct node{
12     int l, r, val;
13 } a[N];
14 
15 int tree[N << 2], ans[N];
16 int n, m;
17 int ret = 0;
18 
19 void update(int i, int L, int R, int l, int r, int val){
20     if (L == l && R == r){ tree[i] |= val; return ;}
21     int mid = (L + R) >> 1;
22     if (r <= mid) update(lson, l, r, val);
23     else if (l > mid) update(rson, l, r, val);
24     else{
25     update(lson, l, mid, val);
26     update(rson, mid + 1, r, val);
27     }
28 }
29 
30 int query(int i, int L, int R, int l, int r){
31     if (L == l && R == r) return tree[i];
32     int mid = (L + R) >> 1;
33     if (r <= mid) return query(lson, l, r);
34     else if (l > mid) return query(rson, l, r);
35     else return query(lson, l, mid) & query(rson, mid + 1, r);
36 }
37 
38 void Work(int i, int L, int R){
39     tree[i] |= tree[i >> 1];
40     if (L == R){ ans[++ret] = tree[i]; return ;}
41     int mid = (L + R) >> 1;
42     Work(lson);
43     Work(rson);
44 }
45     
46 
47 int main(){
48 
49     scanf("%d%d", &n, &m);
50     
51 
52     memset(tree, 0, sizeof tree);
53     rep(i, 1, m){
54     scanf("%d%d%d", &a[i].l, &a[i].r, &a[i].val);
55     update(1, 1, n, a[i].l, a[i].r, a[i].val);
56     }
57 
58     bool flag = true;
59 
60     rep(i, 1, m){
61     int cnt = query(1, 1, n, a[i].l, a[i].r);
62     if (cnt != a[i].val){
63         flag = false;
64         break;
65     }
66     }
67 
68     if (flag) Work(1, 1, n); else return 0 * puts("NO");
69     puts("YES"); rep(i, 1, ret) printf("%d ", ans[i]);
70     
71 
72     return 0;
73 }