/ SeriousOJ /

Record Detail

Accepted


  
# Status Time Cost Memory Cost
#1 Accepted 1ms 540.0 KiB
#2 Accepted 1ms 332.0 KiB
#3 Accepted 1ms 540.0 KiB
#4 Accepted 1ms 328.0 KiB
#5 Accepted 1ms 332.0 KiB
#6 Accepted 1ms 796.0 KiB
#7 Accepted 67ms 2.164 MiB
#8 Accepted 87ms 2.324 MiB
#9 Accepted 68ms 2.199 MiB
#10 Accepted 116ms 2.383 MiB
#11 Accepted 46ms 2.105 MiB
#12 Accepted 128ms 2.875 MiB
#13 Accepted 52ms 2.27 MiB

Code

#include<bits/stdc++.h>
using namespace std;
using ll = long long;

const int N = 1e5 + 3, mod = 1e9 + 7;
int arr[N];

struct Segment_Tree {
    int t[4 * N];

    auto merge(auto &l, auto &r) {
        return l | r;
    }
    void build(int node, int st, int en) { 
        if (st == en) {
            t[node] = arr[st];
            return;
        }
        int mid = (st + en) >> 1;
        build(node << 1, st, mid); 
        build(node << 1 | 1, mid + 1, en); 
        auto &Cur = t[node];
        auto &Left = t[node << 1];
        auto &Right = t[node << 1 | 1];
        Cur = merge(Left, Right);
        return;
    }
    void update(int node, int st, int en, int idx, int val) { 
        if (st == en) {
            t[node] = val;
            return;
        }
        int mid = (st + en) >> 1;
        if (idx <= mid) update(node << 1, st, mid, idx, val);
        else update(node << 1 | 1, mid + 1, en, idx, val);
        auto &Cur = t[node];
        auto &Left = t[node << 1];
        auto &Right = t[node << 1 | 1];
        Cur = merge(Left, Right);
        return;
    }
    int query(int node, int st, int en, int l, int r) { 
        if (st > r || en < l) { 
            return 0; 
        }
        if (l <= st && en <= r) { 
            return t[node];
        }
        int mid = (st + en) >> 1;
        auto Left = query(node << 1, st, mid, l, r);
        auto Right = query(node << 1 | 1, mid + 1, en, l, r);
        return merge(Left, Right);
    }
} st1;

ll Pow(ll a, ll b) {
    ll ans = 1 % mod;
    a %= mod;
    if(a < 0) a += mod;
    while (b) {
        if (b & 1) ans = (ans * a) % mod;
        a = (a * a) % mod;
        b >>= 1;
    }
    return ans;
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0);
    int n, q;
    cin >> n >> q;
    for(int i = 1; i <= n; i++) {
        cin >> arr[i];
    }
    st1.build(1, 1, n);
    while(q--) {
        int type; 
        cin >> type;
        if(type == 1) {
            int pos, x;
            cin >> pos >> x;
            arr[pos] ^= x;
            st1.update(1, 1, n, pos, arr[pos]);
        }
        else {
            int l, r, sum = 0;
            cin >> l >> r;
            bitset<20> orr = st1.query(1, 1, n, l, r);
            for(int b = 0; b < 20; b++) {
                if(orr[b]) {
                    sum += (1 << b);
                    sum %= mod;
                }
            }
            sum = (sum * Pow(2, r - l)) % mod;
            if(sum < 0) sum += mod;
            cout << sum << '\n';
        }
    }
    return 0;
}

Information

Submit By
Type
Submission
Problem
P1183 The Sorcerer’s Subsequence Sum
Language
C++17 (G++ 13.2.0)
Submit At
2025-04-09 20:00:30
Judged At
2025-04-09 20:00:30
Judged By
Score
100
Total Time
128ms
Peak Memory
2.875 MiB