Submission #959832

#	Time	Username	Problem	Language	Result	Execution time	Memory
959832		Neco_arc	XORanges (eJOI19_xoranges)	C++17	100 / 100	981 ms	30944 KiB

xoranges

#include <bits/stdc++.h>

#define ll long long
#define ull unsigned long long
#define all(x) x.begin(), x.end()
#define Neco "XORanges"
#define resp(x) sort(all(x)), x.resize(unique(all(x)) - x.begin())
#define getbit(x,i) ((x >> i)&1)
#define _left id * 2, l, mid
#define _right id * 2 + 1, mid + 1, r
#define cntbit(x) __builtin_popcountll(x)
#define fi(i, a, b) for(int i = a; i <= b; i++)
#define fid(i, a, b) for(int i = a; i >= b; i--)
#define maxn (int) 2e5 + 7

using namespace std;

const ll mod = 2; //972663749
const ll base = 911382323;

mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());

ll GetRandom(ll l, ll r)
{
    return uniform_int_distribution<ll> (l, r)(rng);
}

int n, q;
int a[maxn];

ll md (ll x) { return ((x % mod) + mod) % mod; }

struct BIT {
    struct Node {
        short Sum, Sl;
    } bit[maxn];

    void update(int x, ll val) {
        int w = val < 0 ? -1 : 1;
        while(x < maxn) {
            bit[x].Sl = md(bit[x].Sl + w);
            bit[x].Sum = md(bit[x].Sum + val);
            x += (x & -x);
        }
    }

    int get(int l, int r, Node ans = {0, 0}) {
        --l;
        ll L = l + 1, R = r;
        while(l > 0) {
            ans.Sl = md(ans.Sl - bit[l].Sl);
            ans.Sum = md(ans.Sum - bit[l].Sum);

            l -= (l & -l);
        }

        while(r > 0) {
            ans.Sl = md(ans.Sl + bit[r].Sl);
            ans.Sum = md(ans.Sum + bit[r].Sum);

            r -= (r & -r);
        }

        return md(ans.Sum * (L + R) - ans.Sum + ans.Sl * (-L * R + R - L + 1));
    }
} Bit[30];

void updt(int id, int val) {
    fi(i, 0, 29) if(getbit(a[id], i)) Bit[i].update(id, val * id);
}

void solve()
{

    cin >> n >> q;
    fi(i, 1, n) cin >> a[i], updt(i, 1);

    fi(i, 1, q) {
        int type, x, y;
        cin >> type >> x >> y;

        if(type == 1) updt(x, -1), a[x] = y, updt(x, 1);
        else {
            int ans = 0;
            fi(i, 0, 29) ans += (1 << i) * Bit[i].get(x, y);
            cout << ans << '\n';
        }
    }


}


int main()
{

    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    if(fopen(Neco".inp", "r")) {
        freopen(Neco".inp", "r", stdin);
        freopen(Neco".out", "w", stdout);
    }


    int nTest = 1;
//    cin >> nTest;


    while(nTest--)
    {
        solve();
    }


    return 0;
}

Compilation message (stderr)

xoranges.cpp: In function 'int main()':
xoranges.cpp:102:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  102 |         freopen(Neco".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
xoranges.cpp:103:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  103 |         freopen(Neco".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 12 / 12
• Subtask 2: 18 / 18
• Subtask 3: 25 / 25
• Subtask 4: 20 / 20
• Subtask 5: 25 / 25