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#include <stdio.h>

void convert2DTo1D(int arr[][3], int row, int col, int *result) {
    int k = 0;
    for (int i = 0; i < row; i++) {
        for (int j = 0; j < col; j++) {
            result[k++] = arr[i][j];
        }
    }
}

int main() {
    int arr2D[2][3] = {{1, 2, 3}, {4, 5, 6}};
    int row = sizeof(arr2D) / sizeof(arr2D[0]);
    int col = sizeof(arr2D[0]) / sizeof(arr2D[0][0]);
    int size = row * col;

    int arr1D[size];
    convert2DTo1D(arr2D, row, col, arr1D);

    for (int i = 0; i < size; i++) {
        printf("%d ", arr1D[i]);
    }
    printf("\n");

    return 0;
}

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