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lazy_propagation_iterative.cpp
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#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define pb push_back
#define mp make_pair
#define all(a) begin(a),end(a)
#define FOR(x,val,to) for(int x=(val);x<int((to));++x)
#define FORE(x,val,to) for(auto x=(val);x<=(to);++x)
#define FORR(x,arr) for(auto &x: arr)
#define FORS(x,plus,arr) for(auto x = begin(arr)+(plus); x != end(arr); ++x)
#define FORREV(x,plus,arr) for(auto x = (arr).rbegin()+(plus); x !=(arr).rend(); ++x)
#define REE(s_) {cout<<s_<<'\n';exit(0);}
#define GET(arr) for(auto &i: (arr)) sc(i)
#define whatis(x) cerr << #x << " is " << (x) << endl;
#define e1 first
#define e2 second
#define INF 0x7f7f7f7f
typedef std::pair<int,int> pi;
typedef std::vector<int> vi;
typedef std::vector<std::string> vs;
typedef int64_t ll;
typedef uint64_t ull;
#define umap unordered_map
#define uset unordered_set
using namespace std;
using namespace __gnu_pbds;
#ifdef ONLINE_JUDGE
#define whatis(x) ;
#endif
#ifdef _WIN32
#define getchar_unlocked() _getchar_nolock()
#define _CRT_DISABLE_PERFCRIT_LOCKS
#endif
template<class L, class R> ostream& operator<<(ostream &os, map<L, R> P) { for(auto const &vv: P)os<<"("<<vv.first<<","<<vv.second<<")"; return os; }
template<class T> ostream& operator<<(ostream &os, set<T> V) { os<<"[";for(auto const &vv:V)os<<vv<<","; os<<"]"; return os; }
template<class T> ostream& operator<<(ostream &os, vector<T> V) { os<<"[";for(auto const &vv:V)os<<vv<<","; os<<"]"; return os; }
template<class L, class R> ostream& operator<<(ostream &os, pair<L, R> P) { os<<"("<<P.first<<","<<P.second<<")"; return os; }
inline int fstoi(const string &str){auto it=str.begin();bool neg=0;int num=0;if(*it=='-')neg=1;else num=*it-'0';++it;while(it<str.end()) num=num*10+(*it++-'0');if(neg)num*=-1;return num;}
inline void getch(char &x){while(x = getchar_unlocked(), x < 33){;}}
inline void getstr(string &str){str.clear(); char cur;while(cur=getchar_unlocked(),cur<33){;}while(cur>32){str+=cur;cur=getchar_unlocked();}}
template<typename T> inline bool sc(T &num){ bool neg=0; int c; num=0; while(c=getchar_unlocked(),c<33){if(c == EOF) return false;} if(c=='-'){ neg=1; c=getchar_unlocked(); } for(;c>47;c=getchar_unlocked()) num=num*10+c-48; if(neg) num*=-1; return true;}template<typename T, typename ...Args> inline void sc(T &num, Args &...args){ bool neg=0; int c; num=0; while(c=getchar_unlocked(),c<33){;} if(c=='-'){ neg=1; c=getchar_unlocked(); } for(;c>47;c=getchar_unlocked()) num=num*10+c-48; if(neg) num*=-1; sc(args...); }
template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; //s.find_by_order(), s.order_of_key() <- works like lower_bound
template<typename T> using ordered_map = tree<T, int, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#define N 1000001
int t[N << 1];
int h = sizeof(int) * 8 - __builtin_clz(N);
bool d[N];
int ile[N << 1];
int n;
void calc(int p, int k) {
/* if (d[p] == 0) t[p] = t[p<<1] + t[p<<1|1]; */
/* else t[p] = d[p] * k; */
if (d[p] == 0) t[p] = t[p<<1] + t[p<<1|1];
/* else t[p] = (k - t[p] * k); */
else t[p] = (k - t[p]);
}
void apply(int p, int value, int k) {
/* t[p] = value * k; */
/* if (p < n) d[p] = value; */
t[p] = (k - t[p]);
/* if (p < n) d[p] = value; */
if (p < n) d[p] ^= 1;
}
void build(int l, int r) {
int k = 2;
for (l += n, r += n-1; l > 1; k <<= 1) {
l >>= 1, r >>= 1;
for (int i = r; i >= l; --i) calc(i, k);
}
}
void push(int l, int r) {
int s = h, k = 1 << (h-1);
for (l += n, r += n-1; s > 0; --s, k >>= 1)
for (int i = l >> s; i <= r >> s; ++i) if (d[i] != 0) {
apply(i<<1, d[i], k);
apply(i<<1|1, d[i], k);
d[i] = 0;
}
}
/* void modify(int l, int r, int value) { */
/* if (value == 0) return; */
/* push(l, l + 1); */
/* push(r - 1, r); */
/* int l0 = l, r0 = r, k = 1; */
/* for (l += n, r += n; l < r; l >>= 1, r >>= 1, k <<= 1) { */
/* if (l&1) apply(l++, value, k); */
/* if (r&1) apply(--r, value, k); */
/* } */
/* build(l0, l0 + 1); */
/* build(r0 - 1, r0); */
/* } */
void modify(int l, int r, int value) {
if (value == 0) return;
push(l, l + 1);
push(r - 1, r);
bool cl = false, cr = false;
int k = 1;
for (l += n, r += n; l < r; l >>= 1, r >>= 1, k <<= 1) {
if (cl) calc(l - 1, k);
if (cr) calc(r, k);
/* if (l&1) apply(l++, value, k), cl = true; */
/* if (r&1) apply(--r, value, k), cr = true; */
if (l&1) apply(l++, value, k), cl = true;
if (r&1) apply(--r, value, k), cr = true;
}
for (--l; r > 0; l >>= 1, r >>= 1, k <<= 1) {
if (cl) calc(l, k);
if (cr && (!cl || l != r)) calc(r, k);
}
}
int query(int l, int r) {
push(l, l + 1);
push(r - 1, r);
int res = 0;
for (l += n, r += n; l < r; l >>= 1, r >>= 1) {
if (l&1) res += t[l++];
if (r&1) res += t[--r];
}
return res;
}
int main(){
ios_base::sync_with_stdio(0);cin.tie(0);
n = 10;
h = sizeof(int) * 8 - __builtin_clz(N);
modify(2,5,3);
modify(3,3,3);
/* modify(3,5,3); */
whatis(query(2,2))
whatis(query(3,3))
whatis(query(4,4))
whatis(query(2,3))
whatis(query(2,5))
whatis(query(2,7))
whatis(query(0,6))
}