标签：nod into tick orm include AC nal efi ons
InputThe input consists of several test cases. The first line of the input is the number of the cases. There are no more than 10 cases.
For each case, the first line contains an integer N, 1<=N<=100,000, which is the number of the sticks of Pudge’s meat hook and the second line contains an integer Q, 0<=Q<=100,000, which is the number of the operations.
Next Q lines, each line contains three integers X, Y, 1<=X<=Y<=N, Z, 1<=Z<=3, which defines an operation: change the sticks numbered from X to Y into the metal kind Z, where Z=1 represents the cupreous kind, Z=2 represents the silver kind and Z=3 represents the golden kind.
OutputFor each case, print a number in a line representing the total value of the hook after the operations. Use the format in the example.
Sample Input
1 10 2 1 5 2 5 9 3
Sample Output
Case 1: The total value of the hook is 24.
最简单的区间更新。
1 #pragma warning(disable:4996) 2 #include<cstdio> 3 #include<string> 4 #include<cstring> 5 #include<iostream> 6 #include<algorithm> 7 using namespace std; 8 9 #define lson root<<1 10 #define rson root<<1|1 11 #define ll long long 12 13 const int maxn = 100005; 14 15 int n, q, T; 16 17 struct node { int l, r, sum, add; } Tree[4 * maxn]; 18 19 void Pushup(int root) { 20 Tree[root].sum = Tree[lson].sum + Tree[rson].sum; 21 } 22 23 void Pushdown(int l,int r,int root) { 24 int mid = (l + r) >> 1; 25 Tree[lson].add = Tree[root].add; 26 Tree[rson].add = Tree[root].add; 27 Tree[lson].sum = Tree[root].add * (mid - l + 1); 28 Tree[rson].sum = Tree[root].add * (r - mid); 29 Tree[root].add = 0; 30 } 31 32 void Build(int l, int r, int root) { 33 Tree[root].l = l; 34 Tree[root].r = r; 35 Tree[root].add = 0; 36 if (l == r) { 37 Tree[root].sum = 1; 38 return; 39 } 40 int mid = (l + r) >> 1; 41 Build(l, mid, lson); 42 Build(mid + 1, r, rson); 43 Pushup(root); 44 } 45 46 void Update(int L, int R, int l, int r, int root, int x) { 47 if (l > R || r < L) return; 48 if (L <= l && r <= R) { 49 Tree[root].add = x; 50 Tree[root].sum = x * (r - l + 1); 51 return; 52 } 53 if (Tree[root].add) Pushdown(l, r, root); 54 int mid = (l + r) >> 1; 55 Update(L, R, l, mid, lson, x); 56 Update(L, R, mid + 1, r, rson, x); 57 Pushup(root); 58 } 59 60 61 62 int main() 63 { 64 scanf("%d", &T); 65 for (int t = 1; t <= T; t++) { 66 scanf("%d", &n); 67 Build(1, n, 1); 68 scanf("%d", &q); 69 for (int i = 1; i <= q; i++) { 70 int x, y, d; 71 scanf("%d%d%d", &x, &y, &d); 72 Update(x, y, 1, n, 1, d); 73 } 74 printf("Case %d: ", t); 75 printf("The total value of the hook is %d.\n", Tree[1].sum); 76 } 77 return 0; 78 }
标签：nod into tick orm include AC nal efi ons
原文地址：https://www.cnblogs.com/zgglj-com/p/8847261.html
