HDOJ4348 To the moon

Posted 2020-06-13

主席树区间更新，延迟标记。

  1 /* 4348 */
  2 #include <iostream>
  3 #include <sstream>
  4 #include <string>
  5 #include <map>
  6 #include <queue>
  7 #include <set>
  8 #include <stack>
  9 #include <vector>
 10 #include <deque>
 11 #include <algorithm>
 12 #include <cstdio>
 13 #include <cmath>
 14 #include <ctime>
 15 #include <cstring>
 16 #include <climits>
 17 #include <cctype>
 18 #include <cassert>
 19 #include <functional>
 20 #include <iterator>
 21 #include <iomanip>
 22 using namespace std;
 23 //#pragma comment(linker,"/STACK:102400000,1024000")
 24 
 25 #define sti                set<int>
 26 #define stpii            set<pair<int, int> >
 27 #define mpii            map<int,int>
 28 #define vi                vector<int>
 29 #define pii                pair<int,int>
 30 #define vpii            vector<pair<int,int> >
 31 #define rep(i, a, n)     for (int i=a;i<n;++i)
 32 #define per(i, a, n)     for (int i=n-1;i>=a;--i)
 33 #define clr                clear
 34 #define pb                 push_back
 35 #define mp                 make_pair
 36 #define fir                first
 37 #define sec                second
 38 #define all(x)             (x).begin(),(x).end()
 39 #define SZ(x)             ((int)(x).size())
 40 // #define lson            l, mid, rt<<1
 41 // #define rson            mid+1, r, rt<<1|1
 42 
 43 const int maxn = 1e5+5;
 44 const int maxm = 5e6+5;
 45 int T[maxn];
 46 int lson[maxm], rson[maxm];
 47 __int64 sum[maxm], delta[maxm];
 48 int a[maxn];
 49 int tot, n, q;
 50 
 51 inline void PushUp(int rt) {
 52     sum[rt] = sum[lson[rt]] + sum[rson[rt]];
 53 }
 54 
 55 void init() {
 56     tot = 0;
 57 }
 58 
 59 int Build(int l, int r) {
 60     int rt = tot++;
 61     delta[rt] = 0;
 62     
 63     if (l == r) {
 64         sum[rt] = a[l];
 65         return rt;
 66     }
 67     
 68     int mid = (l + r) >> 1;
 69     
 70     lson[rt] = Build(l, mid);
 71     rson[rt] = Build(mid+1, r);
 72     
 73     PushUp(rt);
 74     return rt;
 75 }
 76 
 77 void copy(int d, int s) {
 78     lson[d] = lson[s];
 79     rson[d] = rson[s];
 80     delta[d] = delta[s];
 81     sum[d] = sum[s];
 82 }
 83 
 84 int Update(int rt, int L, int R, int val, int l, int r) {
 85     int nrt = tot++;
 86     
 87     copy(nrt, rt);
 88     sum[nrt] += 1LL * val * (R - L + 1);
 89     if (L==l && R==r) {
 90         delta[nrt] += val;
 91         return nrt;
 92     }
 93     
 94     int mid = (l + r) >> 1;
 95     
 96     if (R <= mid) {
 97         lson[nrt] = Update(lson[rt], L, R, val, l, mid);
 98     } else if (L > mid) {
 99         rson[nrt] = Update(rson[rt], L, R, val, mid+1, r);
100     } else {
101         lson[nrt] = Update(lson[rt], L, mid, val, l, mid);
102         rson[nrt] = Update(rson[rt], mid+1, R, val, mid+1, r);
103     }
104     
105     return nrt;
106 }
107 
108 __int64 Query(int rt, int L, int R, int l, int r) {
109     if (L==l && R==r)  {
110         return sum[rt];
111     }
112     
113     int mid = (l + r) >> 1;
114     __int64 ret = 1LL * (R-L+1) * delta[rt];
115     
116     if (R <= mid) {
117         ret += Query(lson[rt], L, R, l, mid);
118     } else if (L > mid) {
119         ret += Query(rson[rt], L, R, mid+1, r);
120     } else {
121         ret += Query(lson[rt], L, mid, l, mid);
122         ret += Query(rson[rt], mid+1, R, mid+1, r);
123     }
124     
125     return ret;
126 }
127 
128 void solve() {
129     int cur = 0;
130     char op[4];
131     int l, r, d, t;
132     __int64 ans;
133     
134     init();
135     T[0] = Build(1, n);
136     while (q--) {
137         scanf("%s", op);
138         if (op[0] == ‘B‘) {
139             scanf("%d", &cur);
140         } else if (op[0] == ‘Q‘) {
141             scanf("%d %d", &l, &r);
142             t = cur;
143             ans = Query(T[t], l, r, 1, n);
144             printf("%I64d\n", ans);
145         } else if (op[0] == ‘H‘) {
146             scanf("%d %d %d", &l, &r, &t);
147             ans = Query(T[t], l, r, 1, n);
148             printf("%I64d\n", ans);
149         } else {
150             scanf("%d %d %d", &l, &r, &d);
151             T[cur+1] = Update(T[cur], l, r, d, 1, n);
152             ++cur;
153         }
154     }
155 }
156 
157 int main() {
158     ios::sync_with_stdio(false);
159     #ifndef ONLINE_JUDGE
160         freopen("data.in", "r", stdin);
161         freopen("data.out", "w", stdout);
162     #endif
163     
164     while (scanf("%d %d", &n, &q)!=EOF) {
165         rep(i, 1, n+1)
166             scanf("%d", &a[i]);
167         solve();
168     }
169     
170     #ifndef ONLINE_JUDGE
171         printf("time = %d.\n", (int)clock());
172     #endif
173     
174     return 0;
175 }