Submission #1078438

#TimeUsernameProblemLanguageResultExecution timeMemory
1078438steveonalexXORanges (eJOI19_xoranges)C++17
100 / 100
80 ms8824 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; typedef unsigned long long ull; #define MASK(i) (1LL << (i)) #define GETBIT(mask, i) (((mask) >> (i)) & 1) #define ALL(v) (v).begin(), (v).end() #define block_of_code if(true) ll max(ll a, ll b){return (a > b) ? a : b;} ll min(ll a, ll b){return (a < b) ? a : b;} ll gcd(ll a, ll b){return __gcd(a, b);} ll lcm(ll a, ll b){return a / gcd(a, b) * b;} ll LASTBIT(ll mask){return (mask) & (-mask);} int pop_cnt(ll mask){return __builtin_popcountll(mask);} int ctz(ull mask){return __builtin_ctzll(mask);} int logOf(ull mask){return 63 - __builtin_clzll(mask);} mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); ll rngesus(ll l, ll r){return l + (ull) rng() % (r - l + 1);} double rngesus_d(double l, double r){ double cur = rngesus(0, MASK(60) - 1); cur /= MASK(60) - 1; return l + cur * (r - l); } template <class T1, class T2> bool maximize(T1 &a, T2 b){ if (a < b) {a = b; return true;} return false; } template <class T1, class T2> bool minimize(T1 &a, T2 b){ if (a > b) {a = b; return true;} return false; } template <class T> void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){ for(auto item: container) out << item << separator; out << finish; } template <class T> void remove_dup(vector<T> &a){ sort(ALL(a)); a.resize(unique(ALL(a)) - a.begin()); } struct FenwickTree{ int n; vector<int> a; FenwickTree(int _n){ n = _n; a.resize(n+1); } void update(int i, int v){ while(i <= n){ a[i] ^= v; i += LASTBIT(i); } } int get(int i){ int ans = 0; while(i > 0){ ans ^= a[i]; i -= LASTBIT(i); } return ans; } int get(int l, int r){ return get(r) ^ get(l-1); } }; int main(void){ ios::sync_with_stdio(0);cin.tie(0); cout.tie(0); clock_t start = clock(); int n, q; cin >> n >> q; vector<int> a(n+1); for(int i = 1; i<=n; ++i) cin >> a[i]; FenwickTree bit1(n), bit2(n); for(int i = 1; i<=n; ++i) if (i % 2) bit1.update(i, a[i]); else bit2.update(i, a[i]); while(q--){ int type; cin >> type; if (type == 2){ int l, r; cin >> l >> r; if ((r - l + 1) % 2){ if (l % 2) cout << bit1.get(l, r) << "\n"; else cout << bit2.get(l, r) << "\n"; } else cout << 0 << "\n"; } else{ int i, x; cin >> i >> x; if (i % 2) bit1.update(i, a[i] ^ x); else bit2.update(i, a[i] ^ x); a[i] = x; } } cerr << "Time elapsed: " << clock() - start << " ms\n"; return 0; }
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