#include <stdio.h>

// int tmp, var = 0; を先に宣言する
#define rd_int(var, tmp)                                                                                               \
    for (;;) {                                                                                                         \
        tmp = getc_unlocked(stdin);                                                                                    \
        if (tmp < '0' || tmp > '9') break;                                                                             \
        var = var * 10 + tmp - '0';                                                                                    \
    }

// char buf[9]; int ptr = 0; を先に宣言する
#define wt_int(var, buf, ptr)                                                                                          \
    while (var) {                                                                                                      \
        buf[ptr++] = var % 10;                                                                                         \
        var /= 10;                                                                                                     \
    }                                                                                                                  \
    if (!ptr) buf[ptr++] = 0;                                                                                          \
    while (ptr--) putc_unlocked(buf[ptr] + '0', stdout);

int main() {
    int n = 0, q = 0, i = 0, a, l, r, tmp, ptr, acc[200001];
    char buf[6];

    rd_int(n, tmp);
    rd_int(q, tmp);

    acc[0] = 0;
    for (; i < n; ++i) {
        a = 0;
        rd_int(a, tmp);
        acc[i + 1] = acc[i] ^ a;
        // printf("[%d, %d]\n", a, acc[i + 1]);
    }
    for (i = 0; i < q; ++i) {
        ptr = l = r = 0;
        rd_int(l, tmp);
        rd_int(r, tmp);
        a = acc[r] ^ acc[l - 1];
        // printf("<%d %d %d %d %d, %d>\n", i, l, r, acc[r], acc[l - 1], acc[r] ^ acc[l - 1]);
        wt_int(a, buf, ptr);
        putc_unlocked('\n', stdout);
    }
    return 0;
}