結果
| 問題 | No.879 Range Mod 2 Query |
| コンテスト | |
| ユーザー |
 ningenMe
|
| 提出日時 | 2020-09-27 17:50:10 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.89.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 8,323 bytes |
| 記録 | |
| コンパイル時間 | 5,563 ms |
| コンパイル使用メモリ | 205,000 KB |
| 最終ジャッジ日時 | 2025-01-14 22:59:04 |
|
ジャッジサーバーID （参考情報） |
judge2 / judge2 |
（要ログイン）
| ファイルパターン | 結果 |
|---|---|
| sample | AC * 1 |
| other | AC * 3 WA * 18 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
using ll = long long;
/*
* @title LazySegmentTree - 非再帰抽象化遅延評価セグメント木
* @docs md/segment/LazySegmentTree.md
*/
template<class Operator> class LazySegmentTree {
using TypeNode = typename Operator::TypeNode;
using TypeLazy = typename Operator::TypeLazy;
size_t num;
size_t length;
size_t height;
vector<TypeNode> node;
vector<TypeLazy> lazy;
vector<pair<size_t,size_t>> range;
void propagate(int k) {
if(lazy[k] == Operator::unit_lazy) return;
node[k] = Operator::func_merge(node[k],lazy[k],range[k].first,range[k].second);
if(k < length) lazy[2*k+0] = Operator::func_lazy(lazy[2*k+0],lazy[k]);
if(k < length) lazy[2*k+1] = Operator::func_lazy(lazy[2*k+1],lazy[k]);
lazy[k] = Operator::unit_lazy;
}
public:
//unitで初期化
LazySegmentTree(const size_t num) : num(num) {
for (length = 1,height = 0; length <= num; length *= 2, height++);
node.resize(2 * length, Operator::unit_node);
lazy.resize(2 * length, Operator::unit_lazy);
for (int i = 0; i < num; ++i) node[i + length] = Operator::unit_node;
for (int i = length - 1; i >= 0; --i) node[i] = Operator::func_node(node[(i<<1)+0],node[(i<<1)+1]);
range.resize(2 * length);
for (int i = 0; i < length; ++i) range[i+length] = make_pair(i,i+1);
for (int i = length - 1; i >= 0; --i) range[i] = make_pair(range[(i<<1)+0].first,range[(i<<1)+1].second);
}
// //同じinitで初期化
LazySegmentTree(const size_t num, const TypeNode init) : num(num) {
for (length = 1,height = 0; length <= num; length *= 2, height++);
node.resize(2 * length, Operator::unit_node);
lazy.resize(2 * length, Operator::unit_lazy);
for (int i = 0; i < num; ++i) node[i + length] = init;
for (int i = length - 1; i >= 0; --i) node[i] = Operator::func_node(node[(i<<1)+0],node[(i<<1)+1]);
range.resize(2 * length);
for (int i = 0; i < length; ++i) range[i+length] = make_pair(i,i+1);
for (int i = length - 1; i >= 0; --i) range[i] = make_pair(range[(i<<1)+0].first,range[(i<<1)+1].second);
}
//vectorで初期化
LazySegmentTree(const vector<TypeNode>& vec) : num(vec.size()) {
for (length = 1,height = 0; length <= vec.size(); length *= 2, height++);
node.resize(2 * length, Operator::unit_node);
lazy.resize(2 * length, Operator::unit_lazy);
for (int i = 0; i < vec.size(); ++i) node[i + length] = vec[i];
for (int i = length - 1; i >= 0; --i) node[i] = Operator::func_node(node[(i<<1)+0],node[(i<<1)+1]);
range.resize(2 * length);
for (int i = 0; i < length; ++i) range[i+length] = make_pair(i,i+1);
for (int i = length - 1; i >= 0; --i) range[i] = make_pair(range[(i<<1)+0].first,range[(i<<1)+1].second);
}
//update [a,b)
void update(int a, int b, TypeLazy x) {
int l = a + length, r = b + length - 1;
for (int i = height; 0 < i; --i) propagate(l >> i), propagate(r >> i);
for(r++; l < r; l >>=1, r >>=1) {
if(l&1) lazy[l] = Operator::func_lazy(lazy[l],x), propagate(l),l++;
if(r&1) --r,lazy[r] = Operator::func_lazy(lazy[r],x), propagate(r);
}
l = a + length, r = b + length - 1;
while ((l>>=1),(r>>=1),l) {
if(lazy[l] == Operator::unit_lazy) node[l] = Operator::func_node(Operator::func_merge(node[(l<<1)+0],lazy[(l<<1)+0],range[(l<<1)+0].first,range[(l<<1)+0].second),Operator::func_merge(node[(l<<1)+1],lazy[(l<<1)+1],range[(l<<1)+1].first,range[(l<<1)+1].second));
if(lazy[r] == Operator::unit_lazy) node[r] = Operator::func_node(Operator::func_merge(node[(r<<1)+0],lazy[(r<<1)+0],range[(r<<1)+0].first,range[(r<<1)+0].second),Operator::func_merge(node[(r<<1)+1],lazy[(r<<1)+1],range[(r<<1)+1].first,range[(r<<1)+1].second));
}
}
//get [a,b)
TypeNode get(int a, int b) {
int l = a + length, r = b + length - 1;
for (int i = height; 0 < i; --i) propagate(l >> i), propagate(r >> i);
TypeNode vl = Operator::unit_node, vr = Operator::unit_node;
for(r++; l < r; l >>=1, r >>=1) {
if(l&1) vl = Operator::func_node(vl,Operator::func_merge(node[l],lazy[l],range[l].first,range[l].second)),l++;
if(r&1) r--,vr = Operator::func_node(Operator::func_merge(node[r],lazy[r],range[r].first,range[r].second),vr);
}
return Operator::func_node(vl,vr);
}
//return [0,length]
int prefix_binary_search(TypeNode var) {
int l = length, r = 2*length - 1;
for (int i = height; 0 < i; --i) propagate(l >> i), propagate(r >> i);
if(!Operator::func_check(node[1],var)) return num;
TypeNode ret = Operator::unit_node;
size_t idx = 2;
for(; idx < 2*length; idx<<=1){
if(!Operator::func_check(Operator::func_node(ret,Operator::func_merge(node[idx],lazy[idx],range[idx].first,range[idx].second)),var)) {
ret = Operator::func_node(ret,Operator::func_merge(node[idx],lazy[idx],range[idx].first,range[idx].second));
idx++;
}
}
return min((idx>>1) - length,num);
}
//range[l,r) return [l,r]
int binary_search(size_t l, size_t r, TypeNode var) {
if (l < 0 || length <= l || r < 0 || length < r) return -1;
for (int i = height; 0 < i; --i) propagate((l+length) >> i), propagate((r+length-1) >> i);
TypeNode ret = Operator::unit_node;
size_t off = l;
for(size_t idx = l+length; idx < 2*length && off < r; ){
if(range[idx].second<=r && !Operator::func_check(Operator::func_node(ret,Operator::func_merge(node[idx],lazy[idx],range[idx].first,range[idx].second)),var)) {
ret = Operator::func_node(ret,Operator::func_merge(node[idx],lazy[idx],range[idx].first,range[idx].second));
off = range[idx++].second;
if(!(idx&1)) idx >>= 1;
}
else{
idx <<=1;
}
}
return off;
}
void print(){
// cout << "node" << endl;
// for(int i = 1,j = 1; i < 2*length; ++i) {
// cout << node[i][0] << ":" << node[i][1] << ":" << node[i][2] << ", ";
// if(i==((1<<j)-1) && ++j) cout << endl;
// }
// cout << "lazy" << endl;
// for(int i = 1,j = 1; i < 2*length; ++i) {
// cout << lazy[i][0] << ":" << lazy[i][1] << ":" << lazy[i][2] << ", ";
// if(i==((1<<j)-1) && ++j) cout << endl;
// }
// cout << "vector" << endl;
cout << "{ " << get(0,1)[0] << ":" << get(0,1)[1] << ":" << get(0,1)[2];
for(int i = 1; i < length; ++i) cout << ", " << get(i,i+1)[0] << ":" << get(i,i+1)[1] << ":" << get(i,i+1)[2];
cout << " }" << endl;
}
};
//node:総和 lazy:加算
template<class T, class U> struct NodeSumRangeMod2 {
using TypeNode = T;
using TypeLazy = U;
inline static constexpr TypeNode unit_node = {0,0,1};
//(reverse,mod2,sum)
inline static constexpr TypeLazy unit_lazy = {0,0,0};
inline static constexpr TypeNode func_node(TypeNode l,TypeNode r){
return {l[0]+r[0],l[1]+r[1],l[2]+r[2]};
}
inline static constexpr TypeLazy func_lazy(TypeLazy pre_lazy,TypeLazy cur_lazy){
if(cur_lazy[0]==0) {
if(pre_lazy[0]==1) pre_lazy[2] += cur_lazy[1];
else pre_lazy[1] += cur_lazy[1];
}
if(cur_lazy[0]==1) {
if(pre_lazy[0]==1) {
pre_lazy[1] += pre_lazy[2];
pre_lazy[2] = 0;
}
pre_lazy[0] = 1;
}
return pre_lazy;
}
inline static constexpr TypeNode func_merge(TypeNode node,TypeLazy lazy,int l, int r){
assert(node[1]+node[2]==r-l);
if(lazy[0]==0) {
if(lazy[1]%2) swap(node[1],node[2]);
node[0]+= lazy[1]*(r-l);
}
else {
if(lazy[1]%2) swap(node[1],node[2]);
node[0] = node[1];
node[0]+= lazy[2]*(r-l);
if(lazy[2]%2) swap(node[1],node[2]);
}
return node;
}
inline static constexpr bool func_check(TypeNode nodeVal,TypeNode var){return var <= nodeVal;}
// LazySegmentTree<NodeSumRangeUpdate<ll,ll>> Seg(N,0);
};
using t=array<ll,3>;
int main() {
cin.tie(0);ios::sync_with_stdio(false);
int N,Q; cin >> N >> Q;
vector<t> s(N);
for(int i=0;i<N;++i) {
ll a; cin >> a;
s[i]={a,(a&1),!(a&1)};
}
LazySegmentTree<NodeSumRangeMod2<t,t>> seg(s);
while(Q--) {
int q,l,r; cin >> q >> l >> r; l--;
if(q==1) {
t lazy={1,0,0};
seg.update(l,r,lazy);
}
if(q==2) {
ll x; cin >> x;
t lazy={0,x,0};
seg.update(l,r,lazy);
}
if(q==3) {
cout << seg.get(l,r)[0] << endl;
}
}
return 0;
}