oj.uz

Submission #634044

# Submission time Handle Problem Language Result Execution time Memory
634044 2022-08-23T17:55:43 Z antimirage XORanges (eJOI19_xoranges) C++14
100 / 100
 640 ms 11188 KB 
#include <iostream>
#include <algorithm>
#include <vector>
#include <math.h>
#include <set>
#include <map>

using namespace std;

const int N = 2e5 + 5;

int n, q, a[N], type, l, r, t[2][N * 4];

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

main(){
    cin >> n >> q;
    for (int i = 1; i <= n; i++) {
        scanf("%d", &a[i]);
    }
    build();
    while (q--) {
        cin >> type >> l >> r;
        if (type == 1) {
            update(l, r);
        } else {
            if ((r - l + 1) & 1) {
                printf("%d\n", get(l, r));
            } else {
                puts("0");
            }
        }
    }
}

Compilation message

xoranges.cpp:50:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   50 | main(){
      | ^~~~
xoranges.cpp: In function 'int main()':
xoranges.cpp:53:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   53 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 2 ms 320 KB Output is correct
5 Correct 2 ms 316 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 2 ms 320 KB Output is correct
10 Correct 2 ms 316 KB Output is correct
11 Correct 11 ms 596 KB Output is correct
12 Correct 9 ms 596 KB Output is correct
13 Correct 11 ms 596 KB Output is correct
14 Correct 11 ms 568 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 640 ms 11128 KB Output is correct
2 Correct 480 ms 11156 KB Output is correct
3 Correct 494 ms 11188 KB Output is correct
4 Correct 456 ms 10856 KB Output is correct
5 Correct 453 ms 10844 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 212 KB Output is correct
2 Correct 1 ms 212 KB Output is correct
3 Correct 1 ms 312 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 2 ms 340 KB Output is correct
7 Correct 2 ms 340 KB Output is correct
8 Correct 3 ms 340 KB Output is correct
9 Correct 2 ms 320 KB Output is correct
10 Correct 2 ms 316 KB Output is correct
11 Correct 11 ms 596 KB Output is correct
12 Correct 9 ms 596 KB Output is correct
13 Correct 11 ms 596 KB Output is correct
14 Correct 11 ms 568 KB Output is correct
15 Correct 640 ms 11128 KB Output is correct
16 Correct 480 ms 11156 KB Output is correct
17 Correct 494 ms 11188 KB Output is correct
18 Correct 456 ms 10856 KB Output is correct
19 Correct 453 ms 10844 KB Output is correct
20 Correct 376 ms 10952 KB Output is correct
21 Correct 366 ms 10848 KB Output is correct
22 Correct 354 ms 10848 KB Output is correct
23 Correct 423 ms 10928 KB Output is correct
24 Correct 447 ms 10828 KB Output is correct