标签:style blog http color io os ar for sp
最近各种线段树,然后一直用HH模板!然后老是写不出!
与之搬运过来!
线段树功能:update:单点增减 query:区间求和
#include <cstdio> #define lson l , m , rt << 1 #define rson m + 1 , r , rt << 1 | 1 const int maxn = 55555; int sum[maxn<<2]; void PushUP(int rt) { sum[rt] = sum[rt<<1] + sum[rt<<1|1]; } void build(int l,int r,int rt) { if (l == r) { scanf("%d",&sum[rt]); return ; } int m = (l + r) >> 1; build(lson); build(rson); PushUP(rt); } void update(int p,int add,int l,int r,int rt) { if (l == r) { sum[rt] += add; return ; } int m = (l + r) >> 1; if (p <= m) update(p , add , lson); else update(p , add , rson); PushUP(rt); } int query(int L,int R,int l,int r,int rt) { if (L <= l && r <= R) { return sum[rt]; } int m = (l + r) >> 1; int ret = 0; if (L <= m) ret += query(L , R , lson); if (R > m) ret += query(L , R , rson); return ret; } int main() { int T , n; scanf("%d",&T); for (int cas = 1 ; cas <= T ; cas ++) { printf("Case %d:\n",cas); scanf("%d",&n); build(1 , n , 1); char op[10]; while (scanf("%s",op)) { if (op[0] == ‘E‘) break; int a , b; scanf("%d%d",&a,&b); if (op[0] == ‘Q‘) printf("%d\n",query(a , b , 1 , n , 1)); else if (op[0] == ‘S‘) update(a , -b , 1 , n , 1); else update(a , b , 1 , n , 1); } } return 0; }
线段树功能:update:单点替换 query:区间最值
1 #include <cstdio> 2 #include <algorithm> 3 using namespace std; 4 5 #define lson l , m , rt << 1 6 #define rson m + 1 , r , rt << 1 | 1 7 const int maxn = 222222; 8 int MAX[maxn<<2]; 9 void PushUP(int rt) { 10 MAX[rt] = max(MAX[rt<<1] , MAX[rt<<1|1]); 11 } 12 void build(int l,int r,int rt) { 13 if (l == r) { 14 scanf("%d",&MAX[rt]); 15 return ; 16 } 17 int m = (l + r) >> 1; 18 build(lson); 19 build(rson); 20 PushUP(rt); 21 } 22 void update(int p,int sc,int l,int r,int rt) { 23 if (l == r) { 24 MAX[rt] = sc; 25 return ; 26 } 27 int m = (l + r) >> 1; 28 if (p <= m) update(p , sc , lson); 29 else update(p , sc , rson); 30 PushUP(rt); 31 } 32 int query(int L,int R,int l,int r,int rt) { 33 if (L <= l && r <= R) { 34 return MAX[rt]; 35 } 36 int m = (l + r) >> 1; 37 int ret = 0; 38 if (L <= m) ret = max(ret , query(L , R , lson)); 39 if (R > m) ret = max(ret , query(L , R , rson)); 40 return ret; 41 } 42 int main() { 43 int n , m; 44 while (~scanf("%d%d",&n,&m)) { 45 build(1 , n , 1); 46 while (m --) { 47 char op[2]; 48 int a , b; 49 scanf("%s%d%d",op,&a,&b); 50 if (op[0] == ‘Q‘) printf("%d\n",query(a , b , 1 , n , 1)); 51 else update(a , b , 1 , n , 1); 52 } 53 } 54 return 0; 55 }
线段树功能:update:成段增减 query:区间求和
1 #include <cstdio> 2 #include <algorithm> 3 using namespace std; 4 5 #define lson l , m , rt << 1 6 #define rson m + 1 , r , rt << 1 | 1 7 #define LL long long 8 const int maxn = 111111; 9 LL add[maxn<<2]; 10 LL sum[maxn<<2]; 11 void PushUp(int rt) { 12 sum[rt] = sum[rt<<1] + sum[rt<<1|1]; 13 } 14 void PushDown(int rt,int m) { 15 if (add[rt]) { 16 add[rt<<1] += add[rt]; 17 add[rt<<1|1] += add[rt]; 18 sum[rt<<1] += add[rt] * (m - (m >> 1)); 19 sum[rt<<1|1] += add[rt] * (m >> 1); 20 add[rt] = 0; 21 } 22 } 23 void build(int l,int r,int rt) { 24 add[rt] = 0; 25 if (l == r) { 26 scanf("%lld",&sum[rt]); 27 return ; 28 } 29 int m = (l + r) >> 1; 30 build(lson); 31 build(rson); 32 PushUp(rt); 33 } 34 void update(int L,int R,int c,int l,int r,int rt) { 35 if (L <= l && r <= R) { 36 add[rt] += c; 37 sum[rt] += (LL)c * (r - l + 1); 38 return ; 39 } 40 PushDown(rt , r - l + 1); 41 int m = (l + r) >> 1; 42 if (L <= m) update(L , R , c , lson); 43 if (m < R) update(L , R , c , rson); 44 PushUp(rt); 45 } 46 LL query(int L,int R,int l,int r,int rt) { 47 if (L <= l && r <= R) { 48 return sum[rt]; 49 } 50 PushDown(rt , r - l + 1); 51 int m = (l + r) >> 1; 52 LL ret = 0; 53 if (L <= m) ret += query(L , R , lson); 54 if (m < R) ret += query(L , R , rson); 55 return ret; 56 } 57 int main() { 58 int N , Q; 59 scanf("%d%d",&N,&Q); 60 build(1 , N , 1); 61 while (Q --) { 62 char op[2]; 63 int a , b , c; 64 scanf("%s",op); 65 if (op[0] == ‘Q‘) { 66 scanf("%d%d",&a,&b); 67 printf("%lld\n",query(a , b , 1 , N , 1)); 68 } else { 69 scanf("%d%d%d",&a,&b,&c); 70 update(a , b , c , 1 , N , 1); 71 } 72 } 73 return 0; 74 }
标签:style blog http color io os ar for sp
原文地址:http://www.cnblogs.com/forgot93/p/4008848.html