oj.uz

Submission #445615

# Submission time Handle Problem Language Result Execution time Memory
445615 2021-07-19T04:46:44 Z aris12345678 XORanges (eJOI19_xoranges) C++14
38 / 100
 117 ms 7876 KB 
#include <bits/stdc++.h>
using namespace std;

const int mxN = 2*1e5+5;
int a[mxN], pref[mxN];

int main() {
    int n, q;
    scanf("%d %d", &n, &q);
    for(int i = 0; i < n; i++) {
        scanf("%d", &a[i]);
        if(i == 0 || i == 1)
            pref[i+1] = a[i];
        else
            pref[i+1] = a[i]^pref[i-1];
    }
    while(q--) {
        int type, l, r;
        scanf("%d %d %d", &type, &l, &r);
        if(type == 1)
            a[l-1] = r;
        else {
            if(l%2 != r%2)
                printf("0\n");
            else
                printf("%d\n", pref[r]^pref[l]^a[l-1]);
        }
    }
    return 0;
}

Compilation message

xoranges.cpp: In function 'int main()':
xoranges.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 |     scanf("%d %d", &n, &q);
      |     ~~~~~^~~~~~~~~~~~~~~~~
xoranges.cpp:11:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |         scanf("%d", &a[i]);
      |         ~~~~~^~~~~~~~~~~~~
xoranges.cpp:19:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |         scanf("%d %d %d", &type, &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct

Subtask #3
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 117 ms 7760 KB Output is correct
2 Correct 114 ms 7876 KB Output is correct
3 Correct 113 ms 7784 KB Output is correct
4 Correct 101 ms 7480 KB Output is correct
5 Correct 103 ms 7612 KB Output is correct

Subtask #5
0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -