oj.uz

Submission #344836

# Submission time Handle Problem Language Result Execution time Memory
344836 2021-01-06T15:50:15 Z spike1236 XORanges (eJOI19_xoranges) C++14
100 / 100
 208 ms 11372 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define ll long long
#define ld long double
#define all(_v) _v.begin(), _v.end()
#define sz(_v) (int)_v.size()
#define pii pair <int, int>
#define pll pair <ll, ll>
#define veci vector <int>
#define vecll vector <ll>


const int dx[4] = {1, -1, 0, 0};
const int dy[4] = {0, 0, -1, 1};
const double PI = 3.1415926535897932384626433832795;
const double eps = 1e-9;
const int MOD1 = 1e9 + 7;
const int MOD2 = 998244353;

const int MAXN = 2e5 + 10;
int t[MAXN << 2][2];
int n, q;
int a[MAXN];

void upd(int pos, int val, int v = 1, int tl = 1, int tr = n) {
    if(tl == tr) {
        t[v][pos & 1] = val;
        return;
    }
    int tm = tl + tr >> 1;
    if(pos <= tm) upd(pos, val, v << 1, tl, tm);
    else upd(pos, val, v << 1 | 1, tm + 1, tr);
    for(int j = 0; j < 2; ++j)
        t[v][j] = t[v << 1][j] ^ t[v << 1 | 1][j];
}

int get(int l, int r, int v = 1, int tl = 1, int tr = n) {
    if(l <= tl && tr <= r) return t[v][l & 1];
    if(l > tr || r < tl) return 0;
    int tm = tl + tr >> 1;
    return get(l, r, v << 1, tl, tm) ^ get(l, r, v << 1 | 1, tm + 1, tr);
}

void solve() {
    cin >> n >> q;
    for(int i = 1; i <= n; ++i) {
        cin >> a[i];
        upd(i, a[i]);
    }
    for(int i = 1; i <= q; ++i) {
        int type, l, r;
        cin >> type >> l >> r;
        if(type == 1) a[l] = r, upd(l, r);
        else {
            if((r - l) % 2) cout << "0\n";
            else cout << get(l, r) << '\n';
        }
    }
}


int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int T = 1;
    ///cin >> T;
    while(T--) solve(), cout << '\n';
    return 0;
}

Compilation message

xoranges.cpp: In function 'void upd(int, int, int, int, int)':
xoranges.cpp:34:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   34 |     int tm = tl + tr >> 1;
      |              ~~~^~~~
xoranges.cpp: In function 'int get(int, int, int, int, int)':
xoranges.cpp:44:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   44 |     int tm = tl + tr >> 1;
      |              ~~~^~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 364 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 4 ms 620 KB Output is correct
12 Correct 4 ms 620 KB Output is correct
13 Correct 4 ms 620 KB Output is correct
14 Correct 5 ms 620 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 185 ms 6508 KB Output is correct
2 Correct 192 ms 11372 KB Output is correct
3 Correct 208 ms 11372 KB Output is correct
4 Correct 160 ms 10988 KB Output is correct
5 Correct 166 ms 10920 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 364 KB Output is correct
3 Correct 1 ms 364 KB Output is correct
4 Correct 1 ms 364 KB Output is correct
5 Correct 1 ms 364 KB Output is correct
6 Correct 1 ms 364 KB Output is correct
7 Correct 1 ms 364 KB Output is correct
8 Correct 1 ms 364 KB Output is correct
9 Correct 1 ms 364 KB Output is correct
10 Correct 1 ms 364 KB Output is correct
11 Correct 4 ms 620 KB Output is correct
12 Correct 4 ms 620 KB Output is correct
13 Correct 4 ms 620 KB Output is correct
14 Correct 5 ms 620 KB Output is correct
15 Correct 185 ms 6508 KB Output is correct
16 Correct 192 ms 11372 KB Output is correct
17 Correct 208 ms 11372 KB Output is correct
18 Correct 160 ms 10988 KB Output is correct
19 Correct 166 ms 10920 KB Output is correct
20 Correct 187 ms 10988 KB Output is correct
21 Correct 188 ms 10988 KB Output is correct
22 Correct 184 ms 10988 KB Output is correct
23 Correct 180 ms 10988 KB Output is correct
24 Correct 165 ms 10988 KB Output is correct