제출 #445580

#제출 시각아이디문제언어결과실행 시간메모리
445580aris12345678XORanges (eJOI19_xoranges)C++14
0 / 100
1082 ms4804 KiB
#include <bits/stdc++.h>
using namespace std;

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

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

컴파일 시 표준 에러 (stderr) 메시지

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:14:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |         scanf("%d %d %d", &type, &l, &r);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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