oj.uz

Submission #229737

# Submission time Handle Problem Language Result Execution time Memory
229737 2020-05-06T08:17:26 Z Coder XORanges (eJOI19_xoranges) C++14
100 / 100
 150 ms 3140 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef pair<int,int> pii;
#define SZ(x) (int)(x.size())
#define F0(i,n) for(int i=0;i<n;i++)
#define F1(i,n) for(int i=1;i<=n;i++)
#define CL(a,x) memset(x, a, sizeof(x));
#define PR(x) cerr << #x << "=" << (x) << endl;
const int inf = 1000000009;
const double pi = atan(1.0)*4.0;
const double eps = 1e-8;
const int N = 200001;
int i, j, k, m, n;
int a[N];

int h[2][N];
void add(int ind, int x, int val) {
    while (x <= n/2+1) {
        h[ind][x] ^= val;
        x = (x|(x-1)) + 1;
    }
}
int get(int ind, int x) {
    int ret = 0;
    while (x) {
        ret ^= h[ind][x];
        x &= (x-1);
    }
    return ret;
}
int main() {
    //freopen("x.in", "r", stdin);

    int q, t;
    cin >> n >> q;
    F1(i, n) {
        scanf("%d", &a[i]);
        add(i % 2, (i + 1) / 2, a[i]);
    }
    while (q--) {
        scanf("%d%d%d", &t, &i, &j);
        if (t == 1) {
            add(i % 2, (i + 1) / 2, a[i]);
            a[i] = j;
            add(i % 2, (i + 1) / 2, a[i]);
        } else {
            int len = j - i + 1;
            int ret = 0;
            if (len % 2) {
                ret = get(j % 2, (j + 1) / 2) ^ get(i % 2, (i - 1) / 2);
            }
          printf("%d\n", ret);
        }
    }


    return 0;
}

Compilation message

xoranges.cpp: In function 'int main()':
xoranges.cpp:38:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &a[i]);
         ~~~~~^~~~~~~~~~~~~
xoranges.cpp:42:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d%d", &t, &i, &j);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct

Subtask #3
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 8 ms 384 KB Output is correct
12 Correct 7 ms 384 KB Output is correct
13 Correct 8 ms 384 KB Output is correct
14 Correct 7 ms 384 KB Output is correct

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 146 ms 3060 KB Output is correct
2 Correct 141 ms 3036 KB Output is correct
3 Correct 150 ms 3064 KB Output is correct
4 Correct 132 ms 3140 KB Output is correct
5 Correct 132 ms 3068 KB Output is correct

Subtask #5
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 4 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 4 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 8 ms 384 KB Output is correct
12 Correct 7 ms 384 KB Output is correct
13 Correct 8 ms 384 KB Output is correct
14 Correct 7 ms 384 KB Output is correct
15 Correct 146 ms 3060 KB Output is correct
16 Correct 141 ms 3036 KB Output is correct
17 Correct 150 ms 3064 KB Output is correct
18 Correct 132 ms 3140 KB Output is correct
19 Correct 132 ms 3068 KB Output is correct
20 Correct 141 ms 2552 KB Output is correct
21 Correct 139 ms 2424 KB Output is correct
22 Correct 138 ms 2424 KB Output is correct
23 Correct 138 ms 3064 KB Output is correct
24 Correct 137 ms 3064 KB Output is correct